| P76 | Other intestinal obstruction of newborn |
| P76.0 | Meconium plug syndrome |
| P76.1 | Transitory ileus of newborn |
| P76.2 | Intestinal obstruction due to inspissated milk |
| P76.8 | Other specified intestinal obstruction of newborn |
| P76.9 | Intestinal obstruction of newborn, unspecified |
| P77 | Necrotizing enterocolitis of newborn |
| P77.1 | Stage 1 necrotizing enterocolitis in newborn |
| P77.2 | Stage 2 necrotizing enterocolitis in newborn |
| P77.3 | Stage 3 necrotizing enterocolitis in newborn |
| P77.9 | Necrotizing enterocolitis in newborn, unspecified |
| P78 | Other perinatal digestive system disorders |
| P78.0 | Perinatal intestinal perforation |
| P78.1 | Other neonatal peritonitis |
| P78.2 | Neonatal hematemesis and melena due to swallowed maternal blood |
| P78.3 | Noninfective neonatal diarrhea |
| P78.8 | Other specified perinatal digestive system disorders |
| P78.81 | Congenital cirrhosis (of liver) |
| P78.82 | Peptic ulcer of newborn |
| P78.83 | Newborn esophageal reflux |
| P78.89 | Other specified perinatal digestive system disorders |
| P78.9 | Perinatal digestive system disorder, unspecified |