C00.6
BillableMalignant neoplasm of commissure of lip, unspecified
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is C00.6 an HCC code?
No. C00.6 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
C00.6 is the ICD-10-CM diagnosis code for malignant neoplasm of commissure of lip, unspecified. Cancer that starts at the corner or junction where the upper and lower lips meet. C00.6 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of lip, oral cavity and pharynx (c00-c14).
C00.6 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
The commissure is the anatomical point where the lips meet at the corners of the mouth.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for C00.6 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •The commissure is the anatomical point where the lips meet at the corners of the mouth
- •This code is used when the cancer involves this specific junction area