I63 Cerebral infarction
The ICD-10-CM code for Cerebral infarction is I63 (FY2026). It is a non-billable category code — select a more specific code below for claims.
Classification
- Section
- I60-I69: Cerebrovascular diseases (I60-I69)
- Category I63
- 117 codes (91 billable)
- FY2026 Status
- Stable since FY2024
Official Coding Guidelines
NIHSS (R29.7--) with acute stroke (I60-I63); sequence after stroke code(s)i. NIHSS Stroke Scale The NIH stroke scale (NIHSS) codes (R29.7- -) can be used in conjunction with acute stroke codes (I60-I63) to identify the patient's neurological status and the severity of the stroke. The stroke scale codes should be sequenced after the acute stroke diagnosis code(s). At a minimum, report the initial score documented. If desired, a facility may choose to capture multiple stroke scale scores. See Section I.B.14. for NIHSS stroke scale documentation by clinicians other than patient's provider
Presumed relationship due to Index term “with”The classification presumes a causal relationship between hypertension and heart involvement and between hypertension and kidney involvement, as the two conditions are linked by the term “with” in the Alphabetic Index. These conditions should be coded as related even in the absence of provider documentation explicitly linking them, unless the documentation clearly states the conditions are unrelated.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026