Excludes1 pair
P91- vs P91.0
P91 and P91.0 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
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
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