C9901

What C9901 is

Endoscopic defect closure within the entire gastrointestinal tract, including upper endoscopy (including diagnostic, if performed) or colonoscopy (including diagnostic, if performed), with all system and tissue anchoring components

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

Medically Unlikely Edit (MUE)

Medicare caps C9901 at 1 unit per date of service for practitioner claims (MAI 2 - date of service edit (absolute): units above the MUE never pay), rationale: Code Descriptor / CPT Instruction. Units above the cap are denied unless the edit's adjudication rules allow an appeal with documentation.

Billed with C9901? These codes are bundled into it

C9901 is a Column 1 code in 276 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.

Showing 30 of 276 column 2 codes. Use the pair checker for any specific combination.

C9901 is bundled into these codes

C9901 appears as a Column 2 code in 19 active edits. Reported with one of these Column 1 codes on the same date of service, C9901 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.