G93.1 vs P84
G93.1 and P84 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 G93.1
neonatal anoxia (P84)
G93.1
Anoxic brain damage, not elsewhere classified
BillableUnspecified
- Chapter 6
- Diseases of the nervous system
- Section
- G89-G99
Indexed under
- Anoxia › cerebral (pathological)
- Damage › brain › anoxic, hypoxic
P84
Other problems with newborn
Billable
- Chapter 16
- Certain conditions originating in the perinatal period
- Section
- P84
Use when the record says
- Acidemia of newborn
- Acidosis of newborn
- Anoxia of newborn NOS
- Asphyxia of newborn NOS
- Hypercapnia of newborn
- Hypoxemia of newborn
- Hypoxia of newborn NOS
- Mixed metabolic and respiratory acidosis of newborn
Indexed under
- Acidosis › mixed metabolic and respiratory, newborn (lactic)
- Acidosis › newborn (lactic)
- Anoxemia › newborn
- Anoxia › intrauterine (pathological)
- Anoxia › newborn (pathological)
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