G45 vs I63.9
G45 (Transient cerebral ischemic attacks and related syndromes) compared with I63.9 (Cerebral infarction, unspecified), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. I63.9 carries an Excludes2 note covering G45: “transient cerebral ischemic attacks and related syndromes (G45.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| G45Transient cerebral ischemic attacks and related syndromes | I63.9Cerebral infarction, unspecified | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Transient cerebral ischemic attacks and related syndromes is a non-billable ICD-10-CM category code (G45). | Cerebral infarction, unspecified is a billable ICD-10-CM diagnosis code (I63.9). |
| Includes | — | occlusion and stenosis of cerebral and precerebral arteries, resulting in cerebral infarction Stroke NOS |
| Use additional code | — | code, if applicable, to identify status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82) code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-) code to identify presence of: |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources