P91.5 vs R40.2423
P91.5 (Neonatal coma) compared with R40.2423 (Glasgow coma scale score 9-12, at hospital admission), 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. R40.2423 carries an Excludes1 note covering P91.5: “neonatal coma (P91.5)”
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
| P91.5Neonatal coma | R40.2423Glasgow coma scale score 9-12, at hospital admission | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Neonatal coma is a billable ICD-10-CM diagnosis code (P91.5). | Glasgow coma scale score 9-12, at hospital admission is a billable ICD-10-CM diagnosis code (R40.2423). |
| 7th character | — | The following appropriate 7th character is to be added to subcategory R40.24-: |
| Code first | — | any associated: fracture of skull (S02.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources