Medicare coding and reimbursement for clinical laboratory services

¹ Because total and direct bilirubin are coded using the same CPT code (82251), HCFA has chosen to count the CPT codes rather than the number of tests and pay this six-test panel as though it contained only five tests. The old Hepatic Function Panel (80058) included bilirubin (total or direct), which when coded separately is 82250. The new Hepatic Function Panel includes bilirubin (total and direct), which when coded separately is 82251.

	Abstract

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Medicare will continue to increase its efforts to cut spending through aggressive review of claims and the use of new fraud and abuse regulations. Providers must be especially careful to provide correct procedure codes that define precisely what services have been provided and accurate diagnosis codes that link those procedures or tests to an appropriate diagnosis. Medicare reimbursement rules for clinical laboratory procedures are explained, including the proper use of procedure and diagnosis codes. Coding and payment for new automated test panels are discussed, as well as the economic consequences of using smaller panels. Medicare coverage requirements, including medical necessity, are described, as well as the proper use of advance beneficiary notices and the Medicare appeals process.

	Medicare Payment for Clinical Laboratory Services

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Medicare consists of two parts: Medicare Part A covers inpatient hospitalization costs, once the annual deductible has been met, for almost everyone age 65 and older plus the permanently disabled and those with chronic renal disease. Coverage under Part A is automatic. Payment for inpatient care in most hospitals is based on a fixed fee determined for each diagnosis (diagnosis-related groups, DRGs).¹ DRGs are not applied to physician services. Laboratory tests performed for Medicare inpatients are considered a part of the DRG payment. Medicare Part B covers physician services, outpatient clinical laboratory, and x-ray tests for eligible persons along with other medical services and supplies not covered under Part A. Part B is voluntary; however, most who are eligible sign up. There is an annual deductible and a 20% co-payment for all Part B services except outpatient clinical laboratory services.

Most clinical laboratory procedures are paid from laboratory fee schedules issued by individual Medicare carriers. Medicare carriers are contractors, usually large insurance companies, who administer Part B Medicare services in each state. There are 57 carriers, including one for each state and territory plus two in California and three in New York. All physician services, including pathology services not included in the laboratory fee schedule, are paid according to the Physician Fee Schedule. Unlike the laboratory fee schedule, under this schedule co-payments of 20% are collected from the beneficiary so that the actual payment received from Medicare for a given procedure is 80% of the Physician Fee Schedule amount.

Before Medicare pays for any test or diagnostic service, two basic criteria must be met: (a) the service must be covered by Medicare, and (b) the service must be medically necessary and indicated. Once these two criteria are met, Medicare pays for most clinical laboratory tests based on the applicable Laboratory Fee Schedule. Each carrier publishes a unique laboratory fee schedule and adjusts payment levels as determined by Congress during the annual budget process. Updates, when granted, are effective January 1st.

national fee limitations
National caps apply to most laboratory tests. These caps define the maximum amount a carrier may pay for a given test. The 1998 National Limitation amounts for any given test are based on 74% of the median amount listed on all carriers' fee schedules for a particular laboratory test. National caps were reduced from 76% to 74% effective January 1, 1998, resulting in a reduction of 2.63% for most clinical laboratory tests.

Fee schedules may be adjusted only by statutory changes approved by Congress. When the fee schedule is adjusted by a given percentage, national caps are adjusted up or down by the same amount. Medicare payment for clinical laboratory tests is always the lowest of the fee schedule, the national cap, or the actual amount billed. The changes shown in Table 1 have been made to laboratory fees since 1984, when the Laboratory Fee Schedule was established. The dollar amounts at the right-hand side of Table 1 show the effect of fee schedule changes on a test that was reimbursed at $10.00 in 1984.

Certain clinical diagnosis procedures listed in the Pathology and Laboratory sections of the Physicians' Current Procedural Terminology (CPT) (1) are not considered a part of the laboratory fee schedule. The procedures listed below are paid from the Physician Fee Schedule at 80% of the amount listed on that fee schedule. The beneficiary is responsible for the remaining 20% once the annual deductible has been met. These procedures are not subject to national limitations:

• Clinical pathology consultations
• Bone marrow smears and biopsy
• Blood bank physician services
• Skin tests
• Anatomical and surgical pathology services
• Duodenal and gastric intubation
• Sputum and sweat collection

Medicare tests must be billed on an assigned basis. This means that the provider must accept the Medicare reimbursement as payment in full for any covered laboratory test. Medicare patients may not be billed for any additional amounts for covered tests. (See below for policies regarding tests that are not covered by Medicare). Medicare patients may be billed for non-covered services. The mandatory assignment requirement for laboratory tests applies regardless of whether the physician is participating (accepts assignment for all Medicare services) or non-participating (does not accept assignment for all Medicare services).

Direct billing is also required for all Medicare-reimbursed laboratory tests. Tests must be billed directly to Medicare by the laboratory or physician performing the tests. If an outside laboratory performs a test on a referral from a physician, only the reference laboratory may legally bill Medicare for the procedure.

However, hospitals and reference laboratories that send specimens to other laboratories may bill Medicare for tests performed by the other laboratories if the referring laboratory meets any one of the following three exceptions:

• (a) The referring laboratory is located in or is part of a rural hospital;
• (b) The referring laboratory is wholly owned by the reference laboratory, or the referring laboratory wholly owns the reference laboratory, or both referring laboratory and reference laboratory are wholly owned by a third entity; or
• (c) No more than 30% of the clinical diagnostic tests for which a laboratory receives requests annually are performed by another laboratory other than an ownership-related laboratory.

For the purpose of the 30% exception, each CPT code billed counts as one test. For example, when CPT code 80054 is billed, it is counted as one test although 12 tests are performed.

	The Health Care Financing Administration Common Procedure Coding System

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Health Care Financing Administration (HCFA) Common Procedure Coding System (HCPCS) codes were created as a common coding system to be used nationally for processing Medicare claims. HCPCS codes must be used when preparing claims for Medicare and Medicaid patients. The HCPCS system consists of the following three levels:

Level I, which constitutes the major part of the system, is the CPT coding system. For most claims submitted, the CPT code is all that is required.

Level II, National HCPCS Codes, begin with a letter (A–V) and are followed by four numbers. Most of these codes are used for describing supplies and do not apply to laboratory and pathology procedures. These codes are the same throughout the US.

Level III, Local or Intermediary HCPCS codes, begin with W–Z or S and are followed by four digits. These codes are established by local Medicare carriers and are seldom used.

When code levels overlap, local codes have top priority, national codes second, and CPT codes lowest priority.

cpt codes
The procedure code is one of the most important parts of a Medicare claim. The code used determines what and if a laboratory will be paid for any given test or procedure. Use of CPT codes for submitting Medicare claims became mandatory in 1987. Most other insurance companies and third party payers also use these codes to identify what medical procedures have been performed in the course of any episode of illness or medical treatment.

CPT codes are revised and published annually by the American Medical Association (AMA). Of the >7000 procedures listed, ~950 apply to clinical laboratory tests and pathology services. The official AMA-published CPT manual together with its comprehensive cross index should always be used as the primary tool when searching for a particular procedure or test.

Many payers interpret and apply coding rules in unique and sometimes arbitrary ways. The only way to assure full reimbursement for any given procedure is to regularly review claims payments. The success of a coding strategy can be verified only by submitting claims, monitoring the payments received, and comparing the amounts actually paid to the Medicare fee schedules.

Laboratory tests are listed in the CPT by a common procedure name followed by additional information that describes the method, specimen source, or other details. The common procedure name is not repeated when used with more than one code. Care must be taken in reading individual entries to refer back to the common name that precedes the semicolon and to see if any subheadings apply more specifically to the test being coded than the principal code.

procedure code modifiers
Procedure code modifiers are two-digit codes added to the basic five-digit CPT code. Modifiers are used to describe unusual circumstances or to provide additional information regarding a test or procedure. HCFA has created the following additional modifiers which may be used in submitting Medicare claims.

-GA, waiver of liability statement on file.
This modifier is used to indicate that the provider has notified a Medicare patient that the test performed may not be reimbursed by Medicare and may be billed to the patient. Situation- specific waivers of liability must be obtained by a provider and signed by the patient if the patient is to be billed for tests or other services not covered by Medicare.

-GB, distinct procedural service.
This modifier is used to indicate that a procedure or service is distinct or separate from other service(s) performed on the same day. For example, performance of a follow-up test after obtaining an abnormal result from a more general clinical test.

-QP, individually ordered automated test or panel.
This modifier is used to indicate that automated chemistry tests or panels containing only automated chemistry tests were ordered individually and as such are not subject to medical necessity documentation requirements.

-QW, CLIA waived category test.
This modifier is used to indicate a CLIA-waived procedure was used.

-QR, repeat clinical diagnostic lab test performed on the same day to obtain subsequent reportable test value(s) (separate specimens taken in separate encounters).
This modifier is used when it is necessary to obtain multiple results in the course of treatment, for example, concentrations of drugs or hormones during treatment or challenge tests. This modifier is not to be used when codes are available that describe the series of results, e.g., glucose tolerance.

When a modifier is employed, additional information should be provided to support its use. In most cases, use of the modifier alone will not guarantee appropriate reimbursement. Modifiers are to be used sparingly. It is better to use a more specific primary code (with no accompanying description) to describe what was done.

	Medicare Coding Rules for Clinical Laboratory Services

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
When coding individual clinical laboratory procedures, the following coding rules apply:

• (a) Select the name of the procedure that most accurately identifies the service being performed. The listing of a procedure under a particular specialty in the CPT does not restrict its use to that specific specialty.
• (b) When a procedure for a specific analyte is not listed, use the method code that most accurately identifies the procedure used. As a last resort, use an unlisted service code (those ending in 99) plus appropriate description of the procedure.
• (c) Procedures that include multiple tests may not be "unbundled" into component procedures. Unbundling is considered an abusive practice by Medicare.
• (d) Multiple codes may be used to describe a single panel or profile so long as the unbundling rule is not violated.
• (e) Unless otherwise specified, laboratory procedures are assumed to be quantitative.

Additional coding rules apply to test panels and profiles. If a specific code exists for a given combination of tests, that code must be used. It is considered billing fraud to unbundle a test panel to obtain higher reimbursement if a single code exists that more accurately describes the test panel.

	Specimen Collection Codes

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Specimen collection codes are used to identify phlebotomy and other services required to obtain body fluids or tissue for laboratory analysis. Medicare and most other payers allow a separate specimen collection charge for drawing or collecting specimens by venipuncture or catheterization whether the specimen is processed on site or referred to another laboratory for analysis. Only one collection fee is allowed for each patient encounter, even when multiple specimens may be collected. When a series of specimens is collected for a single test (for example, glucose tolerance), the series is treated as a single encounter. For non-Medicare claims, the following CPT code is used:

• 36415 ROUTINE VENIPUNCTURE OR FINGER/HEEL/EAR STICK for collection of specimen(s)

For Medicare claims the following HCPCS code is used:

• G0001 ROUTINE VENIPUNCTURE FOR COLLECTION OF SPECIMEN

This code is used to avoid confusion over the inclusion of finger/heel/ear stick specimens in code 36415. Code G0001 must be used for all Medicare venipunctures (and urine collections by catheterization).

Physician laboratories may charge for specimen collection only when (a) it is accepted and prevailing practice among physicians in the locality to make a separate charge for drawing or collecting a specimen, and (b) it is the customary practice of the physician performing such a service to bill separately for specimen collection. In other words, physicians may collect the $3.00 Medicare venipuncture fee only if they also charge other payers for blood draws.

Specimen collection fees are also paid when it is medically necessary for a laboratory technician to draw a specimen from either a nursing home or homebound patient. The technician must personally draw the specimen. When a laboratory performs the specimen collection, it may receive payment both for the draw and the associated travel to obtain the specimen(s) for testing. Payment may be made to the laboratory even if the nursing facility has on-duty personnel qualified to perform the specimen collection. When the nursing home performs the specimen collection, it may receive payment only for the draw. Specimen collection performed by nursing home personnel for patients covered under Medicare Part A is paid for as part of the payment to the facility for its reasonable costs, not on the basis of the specimen collection fee.

The $3.00 Medicare specimen collection fee does not apply to non-routine venipuncture or arterial punctures. Arterial punctures for blood gas testing should be coded as CPT 36600 (arterial puncture, withdrawal of blood for diagnosis). Non-routine venipunctures, such as those common to pediatrics and those performed in atypical vein sites, should be coded using cardiovascular codes, 36400-36410 or 36420-36425. Medicare reimbursement for these procedures is paid from the Physicians' Medicare Fee Schedule rather than the Medicare Laboratory Fee Schedule.

A code for 24-h urine specimens (81050, volume measurement for timed collection, each) was added in 1993 and is used whenever a volumetric measure of urine is required to report a test result.

	Travel Allowance Codes

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Travel allowance codes are used to identify estimated travel costs when collecting a specimen from a nursing home or homebound patient. A separate fee is payable to cover transportation and expenses for trained personnel who travel to a nursing home or homebound patient to collect a sample. This allowance is made only when a specimen collection fee would be payable. No travel allowance is made when the technician merely performs a messenger service to pick up a specimen drawn by a physician or nursing home personnel. Furthermore, the travel allowance may not be paid to a physician unless the trip to the homebound or nursing home patient was solely for the purpose of drawing a specimen.

HCPCS codes used for travel allowances for Medicare claims are as follows:

• P9603 TRAVEL ALLOWANCE-ONE WAY: in connection with medically necessary laboratory specimen collection drawn from homebound or nursing home patient, prorated as miles actually traveled (carrier allowance on per mile basis); or
• P9604 TRAVEL ALLOWANCE-ONE WAY: in connection with medically necessary laboratory specimen collection drawn from homebound or nursing home patient, prorated as a trip charge (carrier allowance on flat fee basis).

	Drug Testing Codes

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
The following codes are to be used for qualitative instrumental methods:

• 80100 DRUG SCREEN: multiple classes, each procedure
• 80101 DRUG SCREEN: single class, each procedure
• 80102 DRUG CONFIRMATION: each procedure

Quantitative assays should be coded using the appropriate method code or 83520 (immunoassay, other than antibody or infectious agent antigen, quantitative, not otherwise specified).

CPT code 80100 or 80101 is used for the initial screen, depending on whether the method detects multiple classes or a single class of drugs. Each confirmatory identification procedure is coded separately using 80102. These codes may be used in addition to the codes listed in the Therapeutic Drug Assay section of the CPT if the drug(s) determined qualitatively is subsequently quantified.

For example, an overdose of phenobarbital is suspected after obtaining a positive result for a urine screen for barbiturates. A quantitative serum assay for phenobarbital is then performed. Coding would be as follows:

• 80101 DRUG SCREEN: single class (Barbiturates)
• 80184 PHENOBARBITAL

	Evocative/Suppression Testing

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Evocative/suppression testing codes (CPT 80400 through 80440) are used when evocative or suppressive agents are administered, and the subsequent patient response relative to baseline values is measured. These codes are used only for the laboratory component of the overall test. Physician administration of evocative or suppressive agent is reported using the following codes:

• 90780 INFUSION FOR THERAPY/DIAGNOSIS: administered by physician or under direct supervision of physician up to 1 h
• 90781 INFUSION FOR THERAPY/DIAGNOSIS: administered by physician or under direct supervision of physician, each additional hour, up to 8 h
• 90782 THERAPEUTIC OR DIAGNOSTIC INJECTION: subcutaneous or intramuscular
• 90783 THERAPEUTIC OR DIAGNOSTIC INJECTION: intraarterial
• 90784 THERAPEUTIC OR DIAGNOSTIC INJECTION: intravenous

Supplies and drugs used in performing evocative/suppression panels are reported using CPT code 99070 (supplies and materials provided by physician over and above those usually included with the office visit or other services rendered). Appropriate evaluation and management codes may be used to report physician attendance and monitoring. Prolonged physician care codes may be used if appropriate, but not for prolonged infusions reported under CPT codes 90780 and 90781.

	Allergy Testing

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Allergen-specific IgE determinations are coded using the following two codes:

• 86003 ALLERGEN-SPECIFIC IgE: quantitative semiquantitative, each allergen
• 86005 ALLERGEN-SPECIFIC IgE: qualitative, multiallergen screen (dipstick or disk)

CPT code 86003 should be submitted for each allergen determined.

Other allergy testing is described under the Medicine section of the CPT using the following codes (954004-95078). These codes are not part of the laboratory fee schedule and are paid from the Physician Fee Schedule.

scratch, puncture, and prick tests

• 95004 PERCUTANEOUS TESTS: with allergenic extracts, immediate type reaction, specify number of tests
• 95010 PERCUTANEOUS TESTS: sequential and incremental, with drugs, biologicals or venoms, immediate type reaction, specify number of tests

intradermal tests

• 95015 INTRACUTANEOUS TESTS: sequential and incremental, with drugs, biologicals or venoms, immediate type reaction, specify number of tests
• 95024 INTRACUTANEOUS TESTS: with allergenic extracts, immediate type reaction, specify number of tests
• 95028 INTRACUTANEOUS TESTS: with allergenic extracts, delayed type reaction, including reading, specify number of tests

other tests

• 95027 SKIN END POINT
• 95044 PATCH OR APPLICATION TEST(S): specify number of tests
• 95052 PHOTO PATCH TEST(S): specify number of tests
• 95056 PHOTO TESTS
• 95060 OPTHALMIC MUCOUS MEMBRANE TESTS
• 95065 DIRECT NASAL MUCOUS MEMBRANE TEST
• 95070 INHALATION BRONCHIAL CHALLENGE TESTING: with histamine, methacholine, or similar compounds
• 95071 INHALATION BRONCHIAL CHALLENGE TESTING: with antigens or gases, specify
• 95075 INGESTION CHALLENGE TEST
• 85078 PROVOCATIVE TESTING: (for example, Rinkel test)

CPT codes for percutaneous (scratch, puncture, or prick), intracutaneous (intradermal), and patch tests include test performance, evaluation, and correlation with the patient's history, physical examination, and other observations. The number of tests should be dependent upon history, physical findings, and clinical judgment. All patients should not receive the same number or type of sensitivity tests.

	Molecular Diagnostics Procedures

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Molecular diagnostics procedures are coded by procedure rather than analyte using the following codes:

• 83890 MOLECULAR DIAGNOSTICS: molecular isolation or extraction
• 83892 MOLECULAR DIAGNOSTICS: enzyme digestion
• 83894 MOLECULAR DIAGNOSTICS: separation
• 83896 MOLECULAR DIAGNOSTICS: nucleic acid probe, each
• 83898 MOLECULAR DIAGNOSTICS: amplification, e.g., PCR, each
• 83902 MOLECULAR DIAGNOSTICS: reverse transcription
• 83912 MOLECULAR DIAGNOSTICS: interpretation and report

New antigen-specific codes are now used to describe infectious agent antigen detection and quantification using molecular diagnostic procedures (see New Codes for 1998 below).

	Antibody Identification Codes

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
Antibody identification codes are organized together in the Immunology section of the CPT (codes 86602 through 86804). These procedures must be coded as precisely as possible. When multiple tests are performed to detect antibodies to a specific organism or class of immunoglobulin, each assay is to be coded separately.

For example, if antibodies to Coxsackie A and B viruses are determined using two separate assays, the following codes would be used:

• 86658 ANTIBODY: Enterovirus (Coxsackie A)
• 86658 ANTIBODY: Enterovirus (Coxsackie B)

If the IgM immunoglobulin class was subsequently determined for each type of virus, the same code would be used two more times:

• 86658 ANTIBODY: Enterovirus (Coxsackie A, IgM)
• 86658 ANTIBODY: Enterovirus (Coxsackie B, IgM)

When a specific antibody is not listed, one of the following general purpose codes or the appropriate method code should be used:

• 86790 ANTIBODY: virus, not listed elsewhere
• 86671 ANTIBODY: fungus, not listed elsewhere
• 86609 ANTIBODY: bacterium, not listed elsewhere

Identification of antibodies to antigens other than viruses, fungi, or bacteria are coded by method rather than analyte. For example, an immunofluorescent titer for Trichinella antibodies (a parasite) would be coded as:

• 86256 FLUORESCENT ANTIBODY: titer, each antibody

	CLIA 1988 Waived Test Codes

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
CLIA 1988 waived test codes have been assigned to the following simple tests commonly performed in physician offices and other locations. These tests are not subject to many of the regulatory requirements of the Clinical Laboratory Improvement Act of 1988.

• 81002 URINALYSIS, DIPSTICK OR TABLET: (selected analytes); without microscopy, nonautomated
• 81025 URINE PREGNANCY TEST: by visual color comparison methods
• 82270 FECAL OCCULT BLOOD
• 82962 BLOOD GLUCOSE: by glucose monitoring device(s) cleared by the Food and Drug Administration specifically for home use
• 83026 HEMOGLOBIN: by copper sulfate method, nonautomated
• 84830 OVULATION TESTS: by visual color comparison methods for human luteinizing hormone
• 85013 SPUN MICROHEMATOCRIT
• 8565 SEDIMENTATION RATE (ESR): nonautomated

Rather than continue to create new codes for each CLIA-waived product approved by the Food and Drug Administration, HCFA has chosen to use a modifier (QW) to designate waived tests. Payment, in general is the same as for the non-waived version of the same test. The following waived procedures are included in the 1998 laboratory fee schedule:

• 80061QW LIPID PANEL
• 81001QW URINALYSIS: automated dipstick, with microscopy
• 81002QW URINALYSIS: automated dipstick without microscopy
• 82044QW MICROALBUMIN: urine, semiquantitative (reagent strip)
• 82273QW OCCULT BLOOD: other sources, qualitative
• 82465QW CHOLESTEROL: serum, total
• 82947QW GLUCOSE: quantitative
• 82950QW GLUCOSE, POST GLUCOSE DOSE: including glucose
• 82951QW GLUCOSE TOLERANCE TEST: 3 specimens including glucose
• 82952QW GLUCOSE TOLERANCE TEST: each additional specimen beyond 3
• 82985QW GLYCATED PROTEIN
• 83718QW LIPOPROTEIN, HDL CHOLESTEROL: direct measurement
• 83986QW pH BODY FLUID: except blood
• 84478QW TRIGLYCERIDES
• 85014QW BLOOD COUNT, HEMATOCRIT: other than spun
• 85018QW BLOOD COUNT, HEMOGLOBIN
• 85610QW PROTHROMBIN TIME
• 86318QW IMMUNOASSAY FOR INFECTIOUS AGENT ANTIBODY: qualitative, one step
• 6588QW STREPTOCOCCUS: direct screen
• 87072QW CULTURE OR DIRECT BACTERIAL ID: each organism, by commercial kit, other than urine

	Unlisted Procedure Codes

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
When a specific analyte is not listed in the CPT, an unlisted procedure code may be used. However, these codes should be used only as a last resort because many payers will require additional "development" or explanation of why the test was performed. No Medicare fee schedule amounts are published for these codes.

	Method Codes

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
When a specific test analyte can not be found in the CPT, a method code may be used to define the test performed. Such codes may be used only when a more specific code is not available.

	Changes in the 1998 CPT

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
The following new codes have been added to the laboratory section of the 1998 CPT.

miscellaneous laboratory procedures

• 80201 TOPIRAMATE
• 83019 H. PYLORI BREATH TEST: (including drug and breath sample collection kit)
• 84512 TROPONIN: qualitative
• 86148 ANTI-PHOSPHATIDYLSERINE: (Phospholipid)
• 86361 T CELLS: absolute CD4 count

automated test panels

• 80049 BASIC METABOLIC PANEL
• 80054 COMPREHENSIVE METABOLIC PANEL
• 80051 ELECTROLYTE PANEL

Coding rules and medical necessity documentation requirements for automated tests and automated test panels are discussed under New Automated Multichannel Tests.

hepatitis tests

• 86704 HEPATITIS B CORE ANTIBODY: IgG and IgM
• 86705 HEPATITIS B CORE ANTIBODY: IgM
• 86706 HEPATITIS B SURFACE ANTIBODY
• 86707 HEPATITIS Be ANTIBODY
• 86708 HEPATITIS A ANTIBODY: IgG and IgM
• 86709 HEPATITIS A ANTIBODY: IgM
• 86803 HEPATITIS C ANTIBODY
• 86804 HEPATITIS C ANTIBODY: confirmatory test

infectious agent antigens
An extensive new section covering the detection and quantification of infection agent antigens by various methods has been added under "Microbiology" in the Laboratory section of the CPT. These codes replace the following general method codes, which have been deleted.

• 86313 IMMUNOASSAY FOR INFECTIOUS AGENT ANTIGEN: qualitative, multiple-step method
• 86315 IMMUNOASSAY FOR INFECTIOUS AGENT ANTIGEN: qualitative, single-step method

The new codes are organized under the following seven methods:

• (a) detection by direct fluorescent antibody technique;
• (b) detection by enzyme immunoassay technique, qualitative or semiquantitative multistep method;
• (c) detection by enzyme immunoassay technique, qualitative or semiquantitative, single-step method;
• (d) detection by nucleic acid (DNA or RNA), direct probe technique;
• (e) detection by nucleic acid (DNA or RNA), amplified probe technique;
• (f) detection by nucleic acid (DNA or RNA), quantification; and
• (g) detection by immunoassay with direct optical observation.

The following individual CPT codes have been assigned to specific infectious agents under each method category. A general purpose code for unspecified agents is also included for each method.

INFECTIOUS AGENT ANTIGEN DETECTION BY DIRECT FLUORESCENT ANTIBODY TECHNIQUE: qualitative or semiquantitative, multistep method

• 87260 Adenovirus
• 87265 Bordetella pertussis or parapertussis
• 87270 Chlamydia trachomatis
• 87272 Cryptosporidum/giardia
• 87274 Herpes simplex virus
• 87276 Influenza A virus
• 87278 Legionella pneumophila
• 87280 Respiratory syncytial virus
• 87285 Treponema pallidum
• 87290 Varicella zoster
• 87299 Not otherwise specified

INFECTIOUS AGENT ANTIGEN DETECTION BY ENZYME IMMUNOASSAY TECHNIQUE, qualitative or semiquantitative, multistep method

• 87301 Adenovirus enteric types 40/41
• 87320 Chlamydia trachomatis
• 87324 Clostridium difficile toxin A
• 87328 Cryptosporidum/giardia
• 87332 Cytomegalovirus
• 87335 Escherichia coli 0157
• 87340 Hepatitis B surface antigen
• 87350 Hepatitis Be antigen
• 87380 Hepatitis: delta agent
• 87385 Histoplasma capsulatum
• 87390 HIV-1
• 87391 HIV-2
• 87420 Respiratory syncytial virus
• 87425 Rotavirus
• 87449 Streptococcus: group A
• 87449 Multistep method: not otherwise specified
• 87450 Single-step method: not otherwise specified

INFECTIOUS AGENT DETECTION BY IMMUNOASSAY WITH DIRECT OPTICAL OBSERVATION

• 87810 Chlamydia trachomatis
• 87850 Neisseria gonorrhea
• 87880 Streptococcus: group A
• 87899 Agent not otherwise specified

A new series of CPT codes for antigen detection by nucleic acid (DNA or RNA) techniques has been created for the following infectious agents. Each infectious agent detection is classified as either by direct probe technique, amplified probe technique, or quantification.

• Bartonella henselae and Bartonella quintana
• Borrelia burgdorferi
• Candida species
• Chlamydia pneumoniae
• Chlamydia trachomatis
• Cytomegalovirus
• Garderella vaginalis
• Hepatitis B virus
• Hepatitis C
• Hepatitis G
• Herpes simplex virus
• Herpes virus-6
• HIV-1 and HIV-2
• Legionella pneumophila
• Mycobacterium species
• Mycobacterium tuberculosis
• Mycobacterium avium-intracellulare
• Mycoplasma pneumoniae
• Neisseria gonorrhoeae
• Papillomavirus
• Streptococcus, group A
• Infectious agent not otherwise specified

pap smear procedures
Codes 88151 (CYTOPATHOLOGY: smears, cervical or vaginal, up to three smears; requiring physician interpretation) and 88157 (CYTOPATHOLOGY: smears, cervical or vaginal, up to three smears, the Bethesda System (TBS); requiring physician interpretation) have been replaced with the single new code 88141 (CYTOPATHOLOGY: smears, cervical or vaginal, up to three smears; any reporting system, requiring physician interpretation).

Two new codes (88152 and 88158) have been added for automated rescreening of slides using conventional and Bethesda system techniques, and code 88142 has been created for reporting automated thin layer preparations screened by cytotechnologists under physician supervision.

embryo preparation and transfer codes
The following new codes are now available:

• 89251 CULTURE AND FERTILIZATION OF OOCYTE(S): with coculture of embryos
• 89252 ASSISTED OOCYTE FERTILIZATION: microtechnique
• 89253 ASSISTED EMBRYO HATCHING: microtechniques
• 89254 OOCYTE IDENTIFICATION FROM FOLLICULAR FLUID
• 89255 PREPARATION OF EMBRYO FOR TRANSFER
• 89256 PREPARATION OF CRYOPRESERVED EMBRYOS FOR TRANSFER
• 89257 SPERM IDENTIFICATION FROM ASPIRATION: other than seminal fluid
• 89258 CRYOPRESERVATION: embryo
• 89259 CRYOPRESERVATION: sperm
• 89260 SPERM ISOLATION: simple prep, for insemination or diagnosis with semen analysis
• 89261 SPERM ISOLATION: complex prep, for insemination or diagnosis with semen analysis

	Organ- or Disease-oriented Panels

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for... Limiting Liability Relative to... How to Appeal Medicare... Conclusions References

 
When the following organ- or disease-oriented panel codes are used, all included tests must be performed. Medicare reimbursement for these panels is equal to the sum of the fee schedule amounts of the individual tests included. Medicare does not consider the general Health Panel (80050) and the Obstetric Panel (80055) to be covered services.

• 80049 BASIC METABOLIC PANEL: new automated test panel
• 80050 GENERAL HEALTH PANEL: not reimbursed by Medicare
• 80051 ELECTROLYTE PANEL: new automated test panel
• 80054 COMPREHENSIVE METABOLIC PANEL: new automated test panel
• 80055 OBSTETRIC PANEL: not reimbursed by Medicare
• 80058 HEPATIC FUNCTION PANEL: new automated test panel
• 80059 HEPATITIS PANEL
• 80061 LIPID PANEL
• 80072 ARTHRITIS PANEL
• 80090 TORCH ANTIBODY PANEL
• 80091 THYROID PANEL
• 80092 THYROID PANEL WITH THYROID-STIMULATING HORMONE

	Use of the New Automated Test Panels

Top Abstract Medicare Payment for Clinical... The Health Care Financing... Medicare Coding Rules for... Specimen Collection Codes Travel Allowance Codes Drug Testing Codes Evocative/Suppression Testing Allergy Testing Molecular Diagnostics Procedures Antibody Identification Codes CLIA 1988 Waived Test... Unlisted Procedure Codes Method Codes Changes in the 1998... Organ- or Disease-oriented... Use of the New... Medicare Payment Policy for... Medical Necessity Rules for... Local Medical Review Policy Medical Necessity Enforcement... Billing Medicare Patients for...