D23.9
BillableOther benign neoplasm of skin, unspecified
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is D23.9 an HCC code?
No. D23.9 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
D23.9 is the ICD-10-CM diagnosis code for other benign neoplasm of skin, unspecified. A noncancerous growth on the skin when the specific location is not documented or identified. D23.9 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering benign neoplasms, except benign neuroendocrine tumors (d10-d36).
D23.9 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.
Use this code only when the anatomical site of the skin lesion cannot be determined; if site is known, use a more specific D23 code.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D23.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the anatomical site of the skin lesion cannot be determined; if site is known, use a more specific D23 code
- •This is a catch-all code, so ensure documentation doesn't specify a particular body area before assigning