86021 Wbc antibody identification

What 86021 is

CMS fee schedule short descriptor: Wbc antibody identification.

Full CPT long descriptions are licensed by the American Medical Association and are not published on this site; the short descriptor above is the one CMS prints in its own fee schedule file. See About CPT.

Medicare payment for 86021 (CY2026)

This code has no Physician Fee Schedule rate: Statutory exclusion - not payable under the Physician Fee Schedule. It may be paid under a different fee schedule (clinical laboratory, DMEPOS, anesthesia) or not paid at all - check the relevant CMS schedule.

Medically Unlikely Edit (MUE)

Medicare caps 86021 at 1 unit per date of service for practitioner claims (MAI 2 - date of service edit (absolute): units above the MUE never pay), rationale: CMS Policy. Units above the cap are denied unless the edit's adjudication rules allow an appeal with documentation.

Billed with 86021? These codes are bundled into it

86021 is a Column 1 code in 5 active NCCI PTP edits. When one of these Column 2 codes is reported on the same date of service, it is denied as bundled - unless the edit's modifier indicator is 1 and documentation supports a distinct service with an NCCI-associated modifier.

Data: CMS CY2026 Physician Fee Schedule RVU file (October release, RVU26D) and Medicare NCCI PTP practitioner edits v32.3 (2026 Q4). Verify against the official files before billing or contracting decisions.