G45 vs P91.0
G45 (Transient cerebral ischemic attacks and related syndromes) compared with P91.0 (Neonatal cerebral ischemia), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. G45 carries an Excludes1 note covering P91.0: “neonatal cerebral ischemia (P91.0)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| G45Transient cerebral ischemic attacks and related syndromes | P91.0Neonatal cerebral ischemia | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96) |
| Definition | Transient cerebral ischemic attacks and related syndromes is a non-billable ICD-10-CM category code (G45). | Neonatal cerebral ischemia is a billable ICD-10-CM diagnosis code (P91.0). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources