I02.9
BillableRheumatic chorea without heart involvement
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is I02.9 an HCC code?
No. I02.9 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
I02.9 is the ICD-10-CM diagnosis code for rheumatic chorea without heart involvement. A neurological complication of rheumatic fever causing involuntary movements and muscle weakness without documented heart involvement. I02.9 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering acute rheumatic fever (i00-i02).
I02.9 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.
Carefully review the record to confirm absence of cardiac involvement before assigning this code.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for I02.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Carefully review the record to confirm absence of cardiac involvement before assigning this code
- •If any cardiac manifestation is present, use I02.0 instead