K55.3 Necrotizing enterocolitis

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Necrotizing enterocolitis is K55.3 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
K55-K64: Other diseases of intestines (K55-K64)
Category K55
37 codes (27 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with K55.3.
  • necrotizing enterocolitis of newborn (P77.-)
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • necrotizing enterocolitis due to Clostridium difficile (A04.7-)

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.11

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

K55 Vascular disorders of intestine

More Specific Codes

K55.30 Necrotizing enterocolitis, unspecified K55.31 Stage 1 necrotizing enterocolitis K55.32 Stage 2 necrotizing enterocolitis K55.33 Stage 3 necrotizing enterocolitis

Related Codes in K55

K55 Vascular disorders of intestine K55.0 Acute vascular disorders of intestine K55.01 Acute (reversible) ischemia of small intestine K55.011 Focal (segmental) acute (reversible) ischemia of small intestine K55.012 Diffuse acute (reversible) ischemia of small intestine K55.019 Acute (reversible) ischemia of small intestine, extent unspecified K55.02 Acute infarction of small intestine K55.021 Focal (segmental) acute infarction of small intestine K55.022 Diffuse acute infarction of small intestine K55.029 Acute infarction of small intestine, extent unspecified K55.03 Acute (reversible) ischemia of large intestine K55.031 Focal (segmental) acute (reversible) ischemia of large intestine K55.032 Diffuse acute (reversible) ischemia of large intestine K55.039 Acute (reversible) ischemia of large intestine, extent unspecified K55.04 Acute infarction of large intestine K55.041 Focal (segmental) acute infarction of large intestine K55.042 Diffuse acute infarction of large intestine K55.049 Acute infarction of large intestine, extent unspecified K55.05 Acute (reversible) ischemia of intestine, part unspecified K55.051 Focal (segmental) acute (reversible) ischemia of intestine, part unspecified
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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