I67.850
BillableCerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is I67.850 an HCC code?
No. I67.850 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
I67.850 is the ICD-10-CM diagnosis code for cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy. An inherited genetic disorder affecting brain blood vessels that causes small strokes and progressive white matter damage in the brain. I67.850 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering cerebrovascular diseases (i60-i69).
I67.850 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.
Confirm genetic diagnosis or family history documentation to support this rare hereditary condition.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for I67.850 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm genetic diagnosis or family history documentation to support this rare hereditary condition
- •Note the acronym CADASIL is commonly used in clinical documentation for this condition