ICD-10 Code for Stroke
Also indexed as (apoplectic) (brain) (ischemic) (paralytic)
The ICD-10-CM code for stroke is I63.9 — Cerebral infarction, unspecified. This is the code the Alphabetic Index gives for stroke with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
I63.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which stroke code should you use?
The Alphabetic Index lists 10 codes under Stroke. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| cerebral, perinatal | P91.82 | Neonatal cerebral infarction | not billable |
| cerebrovascular | I63.9 | Cerebral infarction, unspecified | |
| cryptogenic | I63.9 | Cerebral infarction, unspecified | |
| heat | T67.01 | Heatstroke and sunstroke | not billable |
| in evolution | I63.9 | Cerebral infarction, unspecified | |
| ischemic, perinatal arterial | P91.82 | Neonatal cerebral infarction | not billable |
| neonatal | P91.82 | Neonatal cerebral infarction | not billable |
| sun | T67.01 | Heatstroke and sunstroke | not billable |
| unspecified | I63.9 | Cerebral infarction, unspecified |
Stroke cerebrovascular
| chronic | Z86.73 | Personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits |
Stroke heat
Stroke intraoperative
Stroke postprocedural
Stroke sun
| specified NEC | T67.09 | Other heatstroke and sunstroke | not billable |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources