2027 ICD-10-CM Diagnosis Code P77Necrotizing enterocolitis of newborn

ICD-10-CM Codes›P00–P96›P76-P78›P77

ICD-10-CM P77
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

P77 is a non-billable ICD-10-CM category code for necrotizing enterocolitis of newborn, so it cannot be submitted on claims. Use a more specific code from this category instead, such as P77.1, P77.2, P77.3, and P77.9.

Code Identity

ICD-10-CM Code
P77
Billable Status
No — Non-Billable Category
Code Describes
Necrotizing enterocolitis of newborn
Short Description
Necrotizing enterocolitis of newborn
Same as the full description in the CMS dataset.
Chapter
P76-P78
Digestive system disorders of newborn

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP76-P78Digestive system disorders of newborn
CategoryP77Necrotizing enterocolitis of newborn
This CodeP77Necrotizing enterocolitis of newborn

Specific Coding for Necrotizing enterocolitis of newbornOverview

Non-specific codes like P77 require more characters. Use one of these billable codes instead:

  • Use P77.1 for Stage 1 necrotizing enterocolitis in newborn

  • Use P77.2 for Stage 2 necrotizing enterocolitis in newborn

  • Use P77.3 for Stage 3 necrotizing enterocolitis in newborn

  • Use P77.9 for Necrotizing enterocolitis in newborn, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to P77: its own notes plus those printed at Chapter 16. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • tetanus neonatorum (A33)

Notes

General instructions on how these codes are used.

From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • Codes from this chapter are for use on newborn records only, never on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name P77, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming P77: they are not reported together with it, unless the two conditions are unrelated.

  • K55 Vascular disorders of intestine
    necrotizing enterocolitis of newborn (P77.-)
  • K55.3 Necrotizing enterocolitis
    necrotizing enterocolitis of newborn (P77.-)

Excludes2 1

These codes carry an Excludes2 note naming P77: its condition is not part of those codes, and both may be reported when the patient has both.

  • P37 Other congenital infectious and parasitic diseases
    necrotizing enterocolitis in newborn (P77.-)

Patient EducationClinical

Premature Babies

Almost 1 of every 10 infants born in the United States are premature, or preemies. A premature birth is when a baby is born before 37 completed weeks of pregnancy. A full-term pregnancy is 40 weeks.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About P77Overview

What is the ICD-10 code for necrotizing enterocolitis of newborn?

P77 is the ICD-10-CM category for necrotizing enterocolitis of newborn, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is P77 (Necrotizing enterocolitis of newborn) a billable code?

No. This is a category header that groups the codes for necrotizing enterocolitis of newborn, and headers cannot be submitted on claims. Claims for necrotizing enterocolitis of newborn need a more specific code from this category, such as P77.1, P77.2, and P77.3.