ICD-10-CM 2027
ICD-10 code for neonatal noninfectious diarrhea
From the official ICD-10-CM alphabetic index entry “Diarrhea, diarrheal (disease) (infantile) (inflammatory) › neonatal (noninfectious)”. Page updated September 29, 2026.
About coding neonatal noninfectious diarrhea
The ICD-10-CM code for neonatal noninfectious diarrhea is P78.3 (Noninfective neonatal diarrhea).
Within P78 (other perinatal digestive system disorders), P78.3 is specifically for noninfective neonatal diarrhea. Related codes cover perinatal intestinal perforation (P78.0), other neonatal peritonitis (P78.1), neonatal hematemesis and melena due to swallowed maternal blood (P78.2), other specified perinatal digestive system disorders (P78.8) and perinatal digestive system disorder, unspecified (P78.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 794 (Neonate with Other Significant Problems, relative weight 1.4935), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about neonatal noninfectious diarrhea ICD-10 codes
What is the ICD-10 code for neonatal noninfectious diarrhea?
- P78.3 — Noninfective neonatal diarrhea.
Is P78.3 billable?
- Yes. P78.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P78.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P78.3 as a principal diagnosis.
Is P78.3 a CC or MCC?
- No. P78.3 is neither a CC nor an MCC under MS-DRG v44.0.