M84.9
BillableDisorder of continuity of bone, unspecified
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M84.9 an HCC code?
No. M84.9 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
M84.9 is the ICD-10-CM diagnosis code for disorder of continuity of bone, unspecified. A general disorder affecting bone continuity or structure when the specific type or location cannot be determined or is not specified. M84.9 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering disorders of bone density and structure (m80-m85).
M84.9 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.
This is a catch-all code; attempt to obtain more specific information about the bone disorder and its location.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M84.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is a catch-all code; attempt to obtain more specific information about the bone disorder and its location
- •Review clinical documentation to determine if a more specific M84 code would be appropriate