ICD-10-CM 2027 diagnosis code

P77Necrotizing enterocolitis of newborn

Not billable — use a more specific code

P77 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About P77

P77 is the ICD-10-CM diagnosis code for necrotizing enterocolitis of newborn. It belongs to block P76-P78 (digestive system disorders of newborn) and chapter 16 (certain conditions originating in the perinatal period). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: P77.1 (newborn), P77.2 (newborn), P77.3 (newborn) and P77.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under P77

Notes that apply from higher levels

Instructions written at a parent level also apply to P77.

Broader instructions also apply from Chapter 16: Certain conditions originating in the perinatal period.

Codes whose notes reference P77

K55Excludes1
K55.3Excludes1
P37Excludes2

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about P77

Is P77 billable?: No. P77 is a header code. Report one of its more specific subcodes instead.