D22.9
BillableMelanocytic nevi, unspecified
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is D22.9 an HCC code?
No. D22.9 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
D22.9 is the ICD-10-CM diagnosis code for melanocytic nevi, unspecified. This code describes a mole or benign skin growth made up of melanocytes (pigment-producing cells) when the specific location on the body is not documented. Melanocytic nevi are common, non-cancerous skin lesions that are typically brown or tan in color. D22.9 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering benign neoplasms, except benign neuroendocrine tumors (d10-d36).
D22.9 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 more specific codes (D22.0-D22.8) when the anatomical site is documented, such as D22.0 for melanocytic nevi of the lip or D22.5 for trunk location.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D22.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use more specific codes (D22.0-D22.8) when the anatomical site is documented, such as D22.0 for melanocytic nevi of the lip or D22.5 for trunk location
- •This unspecified code should only be used when the provider documentation does not specify the location of the nevus or when multiple nevi are present without clear site specification