ICD-10-CM>P00-P96>P76-P78>P77P77Necrotizing enterocolitis of newbornNon-Billable/Non-SpecificCodesP77.1Stage 1 necrotizing enterocolitis in newbornP77.2Stage 2 necrotizing enterocolitis in newbornP77.3Stage 3 necrotizing enterocolitis in newbornP77.9Necrotizing enterocolitis in newborn, unspecified