K55.31 ICD-10-CM Code: Stage 1 necrotizing enterocolitis
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
K55.31Stage 1 necrotizing enterocolitis
ICD-10-CM diagnosis code · United States clinical modification
Where K55.31 sits
- 1
Chapter 11
Diseases of the digestive system (K00-K95)
- 2
Section
Other diseases of intestines (K55-K64)
- 3
Category K55
Vascular disorders of intestine
- 4
Subcategory K55.3
Necrotizing enterocolitis
- 5
Code K55.31
Stage 1 necrotizing enterocolitis
Notes for this code
Inclusion terms
- Necrotizing enterocolitis without pneumatosis, without perforation
Code first
No “code first” instruction is listed for K55.31.
Use additional code
No “use additional code” instruction is listed for K55.31.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for K55.31.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for K55.31.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code K55.31 mean?
K55.31 is the FY 2027 U.S. ICD-10-CM code for “Stage 1 necrotizing enterocolitis.”
Is K55.31 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, K55.31 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is K55.31 located in ICD-10-CM?
K55.31 is listed in Chapter 11, Diseases of the digestive system (K00-K95), within Other diseases of intestines (K55-K64) (K55–K64), under category K55, Vascular disorders of intestine and subcategory K55.3, Necrotizing enterocolitis.
What coding notes are listed for K55.31?
Its listed inclusion terms are Necrotizing enterocolitis without pneumatosis, without perforation. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.