I63.50
BillableCerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery
HCC Category Mapping
V28HCC 249 — Ischemic or Unspecified Stroke
0.289V24HCC 100 — Ischemic or Unspecified Stroke
0.262ESRDHCC 100 — Ischemic or Unspecified Stroke
0.000What This Code Means
A stroke caused by a narrowing or blockage of an unspecified brain artery when the specific artery location cannot be determined.
Coding Tips
- •This is a non-specific code; use only when the exact artery involved is not documented
- •Query provider for more specific artery location when possible to improve coding specificity
Clinical Significance
This code identifies an acute ischemic stroke due to occlusion or stenosis of the unspecified other cerebral artery where the specific mechanism (thrombosis versus embolism) is not documented. This code covers cerebral arteries not individually classified, including smaller or variant vessels. Accurate coding of the mechanism, artery, and laterality is critical for risk adjustment and tracking stroke subtypes for quality measures and secondary prevention strategies.
Documentation Requirements
- ✓Provider documentation of acute cerebral infarction (stroke) as a confirmed diagnosis, not rule-out or suspected
- ✓Identification of the affected artery as the other cerebral artery
- ✓Documentation of laterality (unspecified) supported by clinical findings and/or imaging
- ✓If the mechanism (thrombosis vs. embolism) can be determined from imaging or clinical workup, a more specific code should be assigned
- ✓Neurological examination findings consistent with the identified vascular territory (e.g., variable neurological deficits depending on the specific vascular territory involved)
- ✓Brain imaging (computed tomography or magnetic resonance imaging) confirming acute infarction
- ✓Timing of symptom onset to confirm acute presentation
- ✓Documentation of stroke severity (National Institutes of Health Stroke Scale score preferred)
- ✓Treatment administered (thrombolytics, thrombectomy, antiplatelet therapy, anticoagulation)
Commonly Confused Codes
I63.39 — Cerebral infarction due to thrombosis of other cerebral artery; use when thrombosis is documented as the mechanismI63.49 — Cerebral infarction due to embolism of other cerebral artery; use when embolism is documented as the mechanismI69.3xx — Sequelae of cerebral infarction; use for residual deficits from a prior stroke during follow-up visits, not during the acute eventG45.9 — Transient cerebral ischemic attack, unspecified; use when symptoms resolve completely within 24 hours with no evidence of infarction on imaging
Code Hierarchy
└I63Cerebral infarction└I63.5Cerebral infarction due to unspecified occlusion or stenosis of cerebral arteries└I63.50Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery
└I63.50Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery