ICD10Check
CheckerBrowseOpen

K55.3

⚠ Non-billable (Header)

Necrotizing enterocolitis

Diseases of the digestive system (K00-K95)

⚠️ This is a category header code — not billable. Use a more specific child code below.

Check This Code

❌ Excludes1

direct

Cannot be coded with K55.3

  • • necrotizing enterocolitis of newborn (P77.-)

❌ Excludes1

inherited from K55

Rules from parent category K55: Vascular disorders of intestine

  • • necrotizing enterocolitis of newborn (P77.-)

⚠️ Excludes2

direct

May be coded together if both conditions coexist

  • • necrotizing enterocolitis due to Clostridium difficile (A04.7-)

⚠️ Excludes2

inherited from K55

Rules from parent category K55: Vascular disorders of intestine

  • • angioectasia (angiodysplasia) duodenum (K31.81-)

Child Codes (4)

K55.30Necrotizing enterocolitis, unspecifiedK55.31Stage 1 necrotizing enterocolitisK55.32Stage 2 necrotizing enterocolitisK55.33Stage 3 necrotizing enterocolitis

🧪 Validate Combinations

Add K55.3 to the Excludes Checker to validate against your full code list.

Open in Checker →

Code Information

CodeK55.3
BillableNo — Header code
ParentK55
CategoryDiseases of the digestive system (K00-K95)
Excludes12 rule(s)
Excludes22 note(s)
Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)