CurrentBlue Cross Blue Shield - TexasPolicy CPCP021

Laboratory Panel Billing

Defines appropriate billing and coding for organ- or disease-oriented laboratory panels and related billing rules for providers submitting claims to Blue Cross Blue Shield of Texas.

Policy Summary

PayerBlue Cross Blue Shield - Texas

PolicyLaboratory Panel Billing

Policy CodePolicy CPCP021

Change TypeNo material changes

Effective DateSep 22, 2025

Next Review DateN/A

Key ActionSubmit accurate claims with valid HIPAA-approved codes and provide supporting documentation upon request.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

multiplepanel codes referenced

Modifier 91repeat-test modifier rule

Orders signed/dateddocumentation requirement

May bundle componentsbundling risk

QW modifierCLIA

Laboratory Panel Billing Criteria

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Laboratory panel billing criteria

Rules and criteria for billing laboratory panels and component tests

When all individual tests in a published CPT panel were performed, bill the panel code rather than separate component codes; the Plan may bundle individual component codes into the appropriate panel code for reimbursement if the claim shows individual components that belong to a panel.

Tests performed in addition to those specifically indicated for a particular panel must be reported separately from the panel code.

Do not report two or more panel codes that include the same constituent tests from the same patient collection; if tests overlap multiple panels, use the panel that contains the greatest number of tests and bill remaining tests individually.

Provider-defined (custom) panels are not recognized as coded panels; report the individual test codes accurately for custom panels.

Obstetric panel CPT codes 80055 and 80081 should not be billed when syphilis screening is conducted using a treponemal antibody approach (CPT 86780); in that case report the individual component codes including 86780 with the other tests performed.

Append modifier 91 for clinically indicated repeat testing performed at different times during the same day for treatment monitoring; do not append modifier 91 for reruns due to specimen, equipment, or similar issues. Claims may be denied if modifier 91 is not appended when required or if repeat testing is not justified.

Append modifier QW for CLIA‑waived tests as applicable; laboratories must comply with CLIA requirements and applicable licensing/certification rules.

Documentation requirement: Orders for laboratory tests must be member‑specific, include the rationale/need for the test, and be signed and dated by the ordering health care professional.

Denial/bundling reservation: The Plan reserves the right to bundle individual codes that belong to a panel and may deny Proprietary Laboratory Analyses (PLA) or Multianalyte Assays with Algorithmic Analyses (MAAA) in the absence of supporting evidence that they are necessary, appropriate, and covered.

Claims Submission, Documentation, and Billing Rules

Documentation Required

Claims submission and documentation

Providers must submit accurate claims using valid HIPAA-approved code sets and be prepared to provide additional documentation upon request. Claims are subject to code edit protocols and claim review per benefit terms, provider contract language, medical policies, and coding software logic.

Submit claims using valid HIPAA-approved code sets (e.g., CPT, HCPCS, ICD-10).
Provide additional documentation when requested by the plan or claim reviewers.

Billing Rule

Bundling and panel recognition

The plan may bundle individual component codes into the appropriate published CPT panel code; when documentation shows a panel was ordered and performed but individual components were billed, reviewers may bundle to the panel code for reimbursement. Submit the panel code when all published panel constituents were performed; otherwise report individual test codes accurately with supporting documentation.

If all individual tests in a published CPT panel were performed, bill the panel code rather than separate component codes.
If only some components were performed, report individual test codes accurately.
Be aware claim reviewers and coding software may bundle submitted component codes into the corresponding panel code.

Billing Rule

Repeat testing modifier (Modifier 91)

Append modifier 91 for clinically indicated repeat testing performed at different times during the same day for treatment monitoring. Do not append modifier 91 for reruns done to confirm initial results due to specimen, equipment, or similar issues.

Use modifier 91 when testing is required at different periods throughout the day for treatment of the member.
Do not use modifier 91 for reruns caused by specimen or equipment problems or when a one-time reportable result was sufficient; claims may be denied if 91 is missing or repeat testing is not justified.

Key Definitions and Modifiers

inv-06: Custom panels — definition for provider-defined (custom) panels

DefinitionProvider-defined (custom) panels are not recognized as coded panels; report the individual test codes that comprise the custom panel accurately and appropriately.

Billing consequencePlan may bundle individual component codes into the appropriate published panel code when individual component codes are submitted.

Documentation requirementClaims that include documentation showing a panel was ordered and performed may be rebundled to the panel code even if individual components were billed.

inv-07: CLIA / QW modifier — CLIA regulation reference and use of QW modifier for CLIA-waived tests

Regulatory authorityLaboratory testing is regulated under the Clinical Laboratory Improvement Amendments (CLIA) passed in 1988.

QW modifier useIf a test is CLIA‑waived, providers should append modifier QW to the claim.

Provider resourcesRefer to the plan's provider website for additional CLIA information and testing requirements.

inv-08: Modifier 91 — definition and scope for modifier 91 (repeat testing same day for monitoring; not for reruns)

DefinitionModifier 91 should be appended to claims for repeat testing when testing is required at different periods throughout the same day for treatment monitoring.

Not for rerunsDo not submit modifier 91 when a test is rerun to confirm initial results due to specimen or equipment issues or when only the one-time reportable result was required.

Adjudication impactClaims may be denied if modifier 91 is missing or if repeat testing does not meet standard guidelines on review.