P80 vs R68.0
P80 and R68.0 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 R68.0
newborn hypothermia (P80.-)
P80
Hypothermia of newborn
Not billable
- Chapter 16
- Certain conditions originating in the perinatal period
- Section
- P80-P83
R68.0
Hypothermia, not associated with low environmental temperature
Billable
- Chapter 18
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- Section
- R50-R69
Indexed under
- Hypopyrexia
- Hypothermia › not associated with low environmental temperature (accidental)
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
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