CurrentCentenePolicy CG.CC.PP.01

Outpatient Laboratory Services

Governs billing and payment requirements for outpatient laboratory services (excluding genetic and molecular testing) for providers submitting claims to Centene-adopted health plans.

Policy Summary

PayerCentene

PolicyOutpatient Laboratory Services

Policy CodePolicy CG.CC.PP.01

Change TypeMaterial and operational revisions

Effective Date

Next Review Date

Key ActionInclude ordering and rendering provider information, accurate diagnosis codes, and date/place of service on all claims to avoid denials.

SourceLink

POLICY UPDATE CHANGES

Renamed to 'Outpatient Laboratory Services' and added 'Application' and 'Reimbursement' section headers with restructuring.

Replaced 'HCPCS level I codes for lab tests (G codes and S codes)' with Level II HCPCS and specified in-scope codes exclude genetic and molecular tests (addressed by CG.PP.551).

Added requirement that billed units for tests analyzing multiple analytes must report only one unit of service of one appropriate code when testing consolidates processes.

Added requirement to use modifier codes when billing multiple service units is appropriate, and added guidance for billing when only interpretation of existing data is performed (Modifier 52).

Genetic/molecularTests out of scope

CPT 80000+ M/U + Level IIIncluded code ranges

02/28/2025Last revision

Provider info requiredClaim data reqs

NCCI/PTP & MUECoding edits

Outpatient Laboratory Coverage and Billing Criteria

Outpatient laboratory billing criteria

Covered when ALL of the following billing and coding requirements are met:

Bill for the test performed as indicated on the test requisition form and delivered on the test result.

Include ordering and rendering provider information on all claim transactions.

Include appropriate and accurate diagnosis codes related to the procedure performed; avoid using 3‑digit ICD header codes when insufficient specificity may determine coverage.

Include the date and place of service on all claim transactions to distinguish outpatient testing from emergency department or inpatient services.

Procedure codes must be determined by the attributes of the testing performed (not by diagnosis); bill using AMA/NCCI coding standards.

Policy Summary

PayerCentene

PolicyOutpatient Laboratory Services

Policy CodePolicy CG.CC.PP.01

Change TypeMaterial and operational revisions

Effective Date

Next Review Date

Key ActionInclude ordering and rendering provider information, accurate diagnosis codes, and date/place of service on all claims to avoid denials.

SourceLink

On This Page

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

In-Scope Codes and Units of Service Rules

Covered CPT/HCPCS CodesmixedCovered

80000-series	Pathology and Laboratory Procedures (CPT)
M codes	Category III Multianalyte Assays with Algorithmic Analyses (MAAA)
U codes	Proprietary Lab Analysis (PLA)
Level II HCPCS	Relevant Level II HCPCS lab codes

Units of service (UOS) limit

Do not exceed MUE maximum unitsIf a code falls under a Medically Unlikely Edit (MUE), the units billed must not exceed the maximum units of service (UOS).

Single-unit reporting for multi-analyte consolidated testsWhen a test evaluates multiple analytes using a procedure that consolidates at least one part of the testing process (e.g., tandem mass spectrometry), report only one unit of service of one appropriate Level II HCPCS, CPT, or PLA code.

Use panel codes when applicableIf a test qualifies for panel code(s), the panel code(s) must be used; if a panel code is not appropriate, a limited number of individual components may be billed.

Modifiers for multiple service unitsModifier codes should be used when billing multiple service units is appropriate (including repeat testing, multiple specimens, and testing for multiple species).

Claim Submission and Modifier Guidance for Providers

Documentation Required

Claim submission requirements

Include ordering and rendering provider information on all claim transactions. Include appropriate and accurate diagnosis codes related to the procedure performed using ICD coding. Header (3-digit) ICD codes may lack required specificity and can be denied for insufficient specificity. Include the date and place of service on all claim transactions; Place of Service codes will distinguish outpatient testing from Emergency Department or inpatient testing. Bill for the test performed as indicated on the test requisition form and delivered on the test result.

Bill for the test performed as indicated on the test requisition form and delivered on the test result.
Include ordering and rendering provider information on all claim transactions.
Include appropriate and accurate ICD diagnosis codes; 3-digit ICDs may be insufficient and can be denied for lack of specificity.
Include date of service and Place of Service on all claims to distinguish outpatient, ED, or inpatient testing.

Billing Rule

Coding standards and code selection

Providers must follow AMA and NCCI coding standards when billing laboratory services. Procedure codes are based on the attributes of the testing performed, not the member's diagnosis or clinical indication. If an approved Proprietary Laboratory Analysis (PLA) or MAAA code exists for the test, that PLA/MAAA code must be used. Proprietary codes are limited to the specific test assigned. If a test qualifies for a panel code, the panel code must be used. When a procedure consolidates testing (e.g., tandem mass spectrometry) and evaluates multiple analytes, report one unit of service of the appropriate code. If a panel code is not appropriate, a limited number of individual components from multi-gene tests may be billed. Codes are valid when Date of Service falls after the code effective date and before its retirement.

Follow AMA and NCCI coding standards; payment may be denied for noncompliance.
Use PLA/MAAA codes when applicable; proprietary codes only for their assigned test.
Use panel codes when applicable; report one unit of service when a consolidated procedure evaluates multiple analytes.

Denial Risk

Coding edits and modifier use

Use modifier codes appropriately when multiple service units of a code are legitimate — for example, repeat testing, multiple specimens, or testing multiple species. When interpretation of existing data from a separate test is billed without performing wet lab procedures, bill at an adjusted rate and append Modifier 52 to indicate reduced services. Modifiers must comply with NCCI Procedure-to-Procedure (PTP) edits and Medically Unlikely Edit (MUE) requirements: if a code pair is subject to an NCCI PTP edit, bill in alignment with the edit and use modifiers only when appropriate; Modifier 59 should be used only if no other appropriate modifier describes the service. For codes with an MUE, do not bill units that exceed the maximum Units of Service (UOS) defined by the MUE.

Use modifiers for repeat testing, multiple specimens, or multiple species testing.
Use Modifier 52 when only interpretation is performed and wet lab procedures were not performed.
Comply with NCCI PTP edits; use modifiers only when appropriate. Modifier 59 may be used only if no other modifier better describes the service.
Respect MUEs — do not bill units exceeding the maximum UOS for codes with an MUE.

Definitions

Health Plan

Definition'Health Plan' means a health plan that has adopted this payment policy and that is operated or administered, in whole or in part, by Centene Management Company, LLC, or any applicable affiliate.

Policy applicabilityThis payment policy is effective as of the date determined by the Health Plan; posting date may differ from the effective date.

Not a contractThe payment policy is a guide to payment and does not constitute a contract or guarantee regarding payment or results; coverage is subject to plan documents and legal/regulatory requirements.

Medically Unlikely Edit (MUE)

MUE definitionMedically Unlikely Edit (MUE) is the maximum units of service (UOS) reported for a HCPCS/CPT code on the vast majority of appropriately reported claims by the same provider/supplier for the same beneficiary on the same date of service.

Not all codes have MUEsNot all HCPCS/CPT codes have an assigned MUE; where an MUE exists, billed units must not exceed it.

Alignment with editsIf a code falls under an MUE, billing must align with the MUE limit; MUEs are applied per the NCCI Manual guidance.

Procedure-to-Procedure (PTP) edits

PTP definitionProcedure-to-Procedure (PTP) edits are NCCI edits that prohibit certain codes billed in the presence of other codes because they are considered mutually exclusive procedures.

Modifier use with PTPsIf a code falls under a PTP edit, modifiers must only be used when appropriate; Modifier 59 may be used only if no other appropriate modifier describes the service.

Billing alignmentCodes subject to NCCI PTP edits must be billed in alignment with the edit to avoid denials or adjustments.