Ischemic or Unspecified Stroke
Under the CMS-HCC V28 risk adjustment model (PY2026 Medicare Advantage), HCC 249 carries a community non-dual aged RAF of 0.239, and 95 payable ICD-10-CM diagnosis codes map to it. In the V28 hierarchy it is superseded by HCC 248 when a more severe category in the same disease group is also present.
RAF factors
The community factor varies by Medicaid and originally-disabled status; the institutional factor applies to long-term-institutional members. These are the CMS-HCC V28 PY2026 relative factors.
V28 hierarchy
Trumped by: HCC 248 (a more severe category in the same disease group supersedes this one).
ICD-10-CM codes that map to HCC 249 (95)
Payable diagnosis codes that map to this category under CMS-HCC V28 PY2026. Open any code for its full description, HCC mapping, and coding guidance.
- I63.00Cerebral infarction due to thrombosis of unspecified precerebral artery
- I63.011Cerebral infarction due to thrombosis of right vertebral artery
- I63.012Cerebral infarction due to thrombosis of left vertebral artery
- I63.013Cerebral infarction due to thrombosis of bilateral vertebral arteries
- I63.019Cerebral infarction due to thrombosis of unspecified vertebral artery
- I63.02Cerebral infarction due to thrombosis of basilar artery
- I63.031Cerebral infarction due to thrombosis of right carotid artery
- I63.032Cerebral infarction due to thrombosis of left carotid artery
- I63.033Cerebral infarction due to thrombosis of bilateral carotid arteries
- I63.039Cerebral infarction due to thrombosis of unspecified carotid artery
- I63.09Cerebral infarction due to thrombosis of other precerebral artery
- I63.10Cerebral infarction due to embolism of unspecified precerebral artery
- I63.111Cerebral infarction due to embolism of right vertebral artery
- I63.112Cerebral infarction due to embolism of left vertebral artery
- I63.113Cerebral infarction due to embolism of bilateral vertebral arteries
- I63.119Cerebral infarction due to embolism of unspecified vertebral artery
- I63.12Cerebral infarction due to embolism of basilar artery
- I63.131Cerebral infarction due to embolism of right carotid artery
- I63.132Cerebral infarction due to embolism of left carotid artery
- I63.133Cerebral infarction due to embolism of bilateral carotid arteries
- I63.139Cerebral infarction due to embolism of unspecified carotid artery
- I63.19Cerebral infarction due to embolism of other precerebral artery
- I63.20Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries
- I63.211Cerebral infarction due to unspecified occlusion or stenosis of right vertebral artery
- I63.212Cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery
- I63.213Cerebral infarction due to unspecified occlusion or stenosis of bilateral vertebral arteries
- I63.219Cerebral infarction due to unspecified occlusion or stenosis of unspecified vertebral artery
- I63.22Cerebral infarction due to unspecified occlusion or stenosis of basilar artery
- I63.231Cerebral infarction due to unspecified occlusion or stenosis of right carotid arteries
- I63.232Cerebral infarction due to unspecified occlusion or stenosis of left carotid arteries
- I63.233Cerebral infarction due to unspecified occlusion or stenosis of bilateral carotid arteries
- I63.239Cerebral infarction due to unspecified occlusion or stenosis of unspecified carotid artery
- I63.29Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries
- I63.30Cerebral infarction due to thrombosis of unspecified cerebral artery
- I63.311Cerebral infarction due to thrombosis of right middle cerebral artery
- I63.312Cerebral infarction due to thrombosis of left middle cerebral artery
- I63.313Cerebral infarction due to thrombosis of bilateral middle cerebral arteries
- I63.319Cerebral infarction due to thrombosis of unspecified middle cerebral artery
- I63.321Cerebral infarction due to thrombosis of right anterior cerebral artery
- I63.322Cerebral infarction due to thrombosis of left anterior cerebral artery
- I63.323Cerebral infarction due to thrombosis of bilateral anterior cerebral arteries
- I63.329Cerebral infarction due to thrombosis of unspecified anterior cerebral artery
- I63.331Cerebral infarction due to thrombosis of right posterior cerebral artery
- I63.332Cerebral infarction due to thrombosis of left posterior cerebral artery
- I63.333Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries
- I63.339Cerebral infarction due to thrombosis of unspecified posterior cerebral artery
- I63.341Cerebral infarction due to thrombosis of right cerebellar artery
- I63.342Cerebral infarction due to thrombosis of left cerebellar artery
- I63.343Cerebral infarction due to thrombosis of bilateral cerebellar arteries
- I63.349Cerebral infarction due to thrombosis of unspecified cerebellar artery
- I63.39Cerebral infarction due to thrombosis of other cerebral artery
- I63.40Cerebral infarction due to embolism of unspecified cerebral artery
- I63.411Cerebral infarction due to embolism of right middle cerebral artery
- I63.412Cerebral infarction due to embolism of left middle cerebral artery
- I63.413Cerebral infarction due to embolism of bilateral middle cerebral arteries
- I63.419Cerebral infarction due to embolism of unspecified middle cerebral artery
- I63.421Cerebral infarction due to embolism of right anterior cerebral artery
- I63.422Cerebral infarction due to embolism of left anterior cerebral artery
- I63.423Cerebral infarction due to embolism of bilateral anterior cerebral arteries
- I63.429Cerebral infarction due to embolism of unspecified anterior cerebral artery
- I63.431Cerebral infarction due to embolism of right posterior cerebral artery
- I63.432Cerebral infarction due to embolism of left posterior cerebral artery
- I63.433Cerebral infarction due to embolism of bilateral posterior cerebral arteries
- I63.439Cerebral infarction due to embolism of unspecified posterior cerebral artery
- I63.441Cerebral infarction due to embolism of right cerebellar artery
- I63.442Cerebral infarction due to embolism of left cerebellar artery
- I63.443Cerebral infarction due to embolism of bilateral cerebellar arteries
- I63.449Cerebral infarction due to embolism of unspecified cerebellar artery
- I63.49Cerebral infarction due to embolism of other cerebral artery
- I63.50Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery
- I63.511Cerebral infarction due to unspecified occlusion or stenosis of right middle cerebral artery
- I63.512Cerebral infarction due to unspecified occlusion or stenosis of left middle cerebral artery
- I63.513Cerebral infarction due to unspecified occlusion or stenosis of bilateral middle cerebral arteries
- I63.519Cerebral infarction due to unspecified occlusion or stenosis of unspecified middle cerebral artery
- I63.521Cerebral infarction due to unspecified occlusion or stenosis of right anterior cerebral artery
- I63.522Cerebral infarction due to unspecified occlusion or stenosis of left anterior cerebral artery
- I63.523Cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries
- I63.529Cerebral infarction due to unspecified occlusion or stenosis of unspecified anterior cerebral artery
- I63.531Cerebral infarction due to unspecified occlusion or stenosis of right posterior cerebral artery
- I63.532Cerebral infarction due to unspecified occlusion or stenosis of left posterior cerebral artery
- I63.533Cerebral infarction due to unspecified occlusion or stenosis of bilateral posterior cerebral arteries
- I63.539Cerebral infarction due to unspecified occlusion or stenosis of unspecified posterior cerebral artery
- I63.541Cerebral infarction due to unspecified occlusion or stenosis of right cerebellar artery
- I63.542Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery
- I63.543Cerebral infarction due to unspecified occlusion or stenosis of bilateral cerebellar arteries
- I63.549Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebellar artery
- I63.59Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery
- I63.6Cerebral infarction due to cerebral venous thrombosis, nonpyogenic
- I63.81Other cerebral infarction due to occlusion or stenosis of small artery
- I63.89Other cerebral infarction
- I63.9Cerebral infarction, unspecified
- P91.821Neonatal cerebral infarction, right side of brain
- P91.822Neonatal cerebral infarction, left side of brain
- P91.823Neonatal cerebral infarction, bilateral
- P91.829Neonatal cerebral infarction, unspecified side
Frequently asked questions
What is CMS-HCC V28 category 249?
HCC 249 is "Ischemic or Unspecified Stroke", a payment Hierarchical Condition Category in the CMS-HCC V28 risk adjustment model (100% phase-in for payment year 2026). 95 payable ICD-10-CM codes map to it.
What is the RAF weight for HCC 249?
The community non-dual aged relative factor for CMS-HCC V28 category 249 is 0.239. The exact factor varies by enrollment segment (community Medicaid and originally-disabled status, and institutional); the full segment table is published in the CMS V28 Rate Announcement.
How many ICD-10-CM codes map to HCC 249?
95 payable ICD-10-CM diagnosis codes map to CMS-HCC V28 category 249 (Ischemic or Unspecified Stroke) for payment year 2026.
Which categories trump HCC 249 in the V28 hierarchy?
HCC 249 is superseded by HCC 248 (Intracranial Hemorrhage). When a more severe category in the same disease group is documented, it is counted instead of HCC 249.
Source: CMS published ICD-10-CM mapping file plus CMS-HCC v28 PY2026 model software.