ICD-10-CM 2027
ICD-10 code for peritonitis meconium
From the official ICD-10-CM alphabetic index entry “Meconium › peritonitis”. Page updated September 29, 2026.
About coding peritonitis meconium
The ICD-10-CM code for peritonitis meconium is P78.0 (Perinatal intestinal perforation).
Within P78 (other perinatal digestive system disorders), P78.0 is specifically for perinatal intestinal perforation. Related codes cover other neonatal peritonitis (P78.1), neonatal hematemesis and melena due to swallowed maternal blood (P78.2), noninfective neonatal diarrhea (P78.3), other specified perinatal digestive system disorders (P78.8) and perinatal digestive system disorder, unspecified (P78.9).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), 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 peritonitis meconium ICD-10 codes
What is the ICD-10 code for peritonitis meconium?
- P78.0 — Perinatal intestinal perforation.
Is P78.0 billable?
- Yes. P78.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P78.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P78.0 as a principal diagnosis.
Is P78.0 a CC or MCC?
- P78.0 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.