| P77 | Necrotizing enterocolitis of newborn | NON-BILLABLE CODE |
| P77.1 | Stage 1 necrotizing enterocolitis in newborn | BILLABLE CODE |
| P77.2 | Stage 2 necrotizing enterocolitis in newborn | BILLABLE CODE |
| P77.9 | Necrotizing enterocolitis in newborn, unspecified | BILLABLE CODE |
