C9766

What C9766 is

Revascularization, endovascular, open or percutaneous, lower extremity artery(ies), except tibial/peroneal; with intravascular lithotripsy and atherectomy, includes angioplasty within the same vessel(s), when performed

HCPCS Level II long description, CMS October 2026 file. See the C codes page for the full section.

Medically Unlikely Edit (MUE)

Medicare caps C9766 at 2 units per date of service for practitioner claims (MAI 3 - date of service edit (clinical): units above the MUE may pay with documentation on appeal), rationale: Nature of Service/Procedure. Units above the cap are denied unless the edit's adjudication rules allow an appeal with documentation.

Billed with C9766? These codes are bundled into it

C9766 is a Column 1 code in 1 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.

C9766 is bundled into these codes

C9766 appears as a Column 2 code in 1 active edits. Reported with one of these Column 1 codes on the same date of service, C9766 is the code that denies.

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.