CurrentBlue Cross Blue Shield - IllinoisPolicy CPCP021

Laboratory Panel Billing

Defines appropriate billing and coding for organ- or disease-oriented laboratory panels and related repeat testing, applicable to providers submitting claims to Blue Cross Blue Shield of Illinois.

Policy Summary

PayerBlue Cross Blue Shield - Illinois

PolicyLaboratory Panel Billing

Policy CodePolicy CPCP021

Change TypeNo material change

Effective DateSep 22, 2025

Next Review DateN/A

Key ActionSubmit accurate documentation including signed, dated orders with rationale; append modifier 91 for repeat testing performed at separate times during the same day for treatment.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

5panel codes listed

Modifier 91repeat testing

Not recognizedcustom panels

TreponemalOB panel note

RequiredCLIA

Laboratory Panel Billing Rules

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Laboratory panel billing criteria

Billing and reimbursement rules for organ- or disease-oriented laboratory panels billed the same date of service:

Order must be member-specific, include the rationale/need for the test requested, and be signed and dated by the ordering health care professional.

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

When all individual tests in a published panel have been performed, bill the panel code rather than individual component codes; reviewers or coding software may bundle individual codes into the appropriate panel code for reimbursement.

Tests performed in addition to those specifically indicated for a particular panel should 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; when panels overlap, bill the panel that incorporates the greatest number of tests and report any remaining individual tests separately.

Append modifier 91 for repeat testing performed at different times during the same day when testing is required for treatment; do not append modifier 91 for reruns to confirm results due to specimen, equipment, or other issues. Claims may be denied for failure to append modifier 91 or for repeat testing that does not meet standard guidelines.

In the absence of supporting evidence, Proprietary Laboratory Analyses (PLA) or Multianalyte Assays with Algorithmic Analyses (MAAA) codes are not reimbursable unless necessary, appropriate, and specifically noted as a covered benefit.

When CPT code 85025 is reported with CPT code 85004, the Plan will deny 85004.

Obstetric panel CPT codes 80055 and 80081 should not be billed when syphilis screening is conducted using a treponemal antibody approach (CPT 86780); instead report the individual tests including 86780.

Panel Codes, Constituents, and Reporting

CPT panel codes and constituentsCPT

80053	General Health Panel
80047	Basic metabolic panel (example of overlap restriction)
80061	Lipid panel
80055	Obstetric panel (note on treponemal testing exclusion)
80081	Obstetric panel (+HIV testing) (note on treponemal testing exclusion)

Panel vs individual reporting — billing rules for panels

When to bill panel vs individual testsBill the panel code when all individual tests in the published panel have been performed; do not separately bill the individual component codes for those tests.

Additional testsTests performed in addition to those specifically indicated for a panel should be reported separately from the panel code.

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

Bundling by reviewers/softwareThe Plan may bundle individual codes that belong to a panel; claim reviewers or correct coding software logic may convert submitted component codes into the appropriate panel code for reimbursement.

Example guidanceExample: If Comprehensive Metabolic Panel (80053) is billed, Basic Metabolic Panel (80047) cannot be billed; if Lipid Panel (80061) is billed, component procedures 82465, 83718, 84478 should have been performed.

Documentation, Bundling, and Repeat Testing

Documentation Required

Provide signed, dated, rationale-backed orders; expect bundling by reviewers/software

Submit accurate, member‑specific documentation for ordered laboratory panels: orders must include the rationale/need, and be signed and dated by the ordering health care professional. Claims may be reviewed and individual component codes may be bundled into a published panel code by plan reviewers or coding software when the documentation or submitted codes demonstrate a panel was ordered or when individual codes correspond to a published panel.

Orders must be member-specific, include rationale/need, and be signed and dated by the ordering professional.
Provider-defined (custom) panels are not recognized; report individual component test codes when no published panel applies.
Plan reviewers and/or correct coding software logic may bundle individual component codes into the appropriate panel code for reimbursement.

Billing Rule

Use modifier 91 for true within-day repeat testing for treatment only

Append modifier 91 when repeat testing is performed at different times during the same day for treatment; do not append modifier 91 for reruns performed solely to confirm initial results due to specimen, equipment, or similar issues.

Append modifier 91 for repeat tests required at different periods throughout the same day for treatment.
Do not append modifier 91 for reruns to confirm initial results due to specimen or equipment issues; claims may be denied if modifier 91 is not appended when required or if repeat testing does not meet standard guidelines.

Terms and Regulatory Modifiers

Provider-defined (custom) panels

Recognition of custom panelsProvider-defined (custom) panels are not recognized as coded panels; the codes for the individual tests in the custom panel must be reported accurately and appropriately.

Reporting requirementReport individual component test codes when a proprietary or custom panel is used rather than a published CPT panel code.

Bundling caveatIn the absence of billing as a published panel, the Plan reserves the right to bundle individual codes that belong to a panel into the appropriate panel code for reimbursement.

CLIA and QW modifier

CLIA regulation appliesAll laboratory testing for health assessment, diagnosis, prevention, or treatment is regulated under the Clinical Laboratory Improvement Amendments (CLIA).

QW modifier for waived testsIf a test is CLIA-waived, providers should append modifier QW to the claim.

Reference for detailsFor additional CLIA information, refer to the plan's provider website as noted in the policy.