D21.10
BillableBenign neoplasm of connective and other soft tissue of unspecified upper limb, including shoulder
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is D21.10 an HCC code?
No. D21.10 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
D21.10 is the ICD-10-CM diagnosis code for benign neoplasm of connective and other soft tissue of unspecified upper limb, including shoulder. A benign (non-cancerous) tumor of connective tissue or soft tissue in the upper arm or shoulder area when the side is not specified. D21.10 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering benign neoplasms, except benign neuroendocrine tumors (d10-d36).
D21.10 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 only when laterality (right vs. left) cannot be determined from documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D21.10 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use only when laterality (right vs. left) cannot be determined from documentation
- •Query the provider to determine if the tumor is on the right or left side for more specific coding