ICD-10-CM 2027
ICD-10 code for swallowed blood syndrome
From the official ICD-10-CM alphabetic index entry “Syndrome › swallowed blood”. Page updated September 29, 2026.
About coding swallowed blood syndrome
The ICD-10-CM code for swallowed blood syndrome is P78.2 (Neonatal hematemesis and melena due to swallowed maternal blood).
Within P78 (other perinatal digestive system disorders), P78.2 is specifically for neonatal hematemesis and melena due to swallowed maternal blood. Related codes cover perinatal intestinal perforation (P78.0), other neonatal peritonitis (P78.1), noninfective neonatal diarrhea (P78.3), 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 swallowed blood syndrome ICD-10 codes
What is the ICD-10 code for swallowed blood syndrome?
- P78.2 — Neonatal hematemesis and melena due to swallowed maternal blood.
Is P78.2 billable?
- Yes. P78.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P78.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P78.2 as a principal diagnosis.
Is P78.2 a CC or MCC?
- No. P78.2 is neither a CC nor an MCC under MS-DRG v44.0.