P91 vs P91.0
P91 and P91.0 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on P91.0
Neonatal cerebral infarction (P91.82-)
P91
Other disturbances of cerebral status of newborn
Not billable
- Chapter 16
- Certain conditions originating in the perinatal period
- Section
- P90-P96
P91.0
Neonatal cerebral ischemia
Billable
- Chapter 16
- Certain conditions originating in the perinatal period
- Section
- P90-P96
Indexed under
- Ischemia, ischemic › cerebral › newborn
- Newborn › affected by › cerebral ischemia (infant) (liveborn) (singleton)
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027