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K55.03

⚠ Non-billable (Header)

Acute (reversible) ischemia of large intestine

Diseases of the digestive system (K00-K95)

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

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Also Known As

Acute fulminant ischemic colitisSubacute ischemic colitis
✅ No additional coding notes for K55.03

Child Codes (3)

K55.031Focal (segmental) acute (reversible) ischemia of large intestineK55.032Diffuse acute (reversible) ischemia of large intestineK55.039Acute (reversible) ischemia of large intestine, extent unspecified

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Code Information

CodeK55.03
BillableNo — Header code
ParentK55.0
CategoryDiseases of the digestive system (K00-K95)
Excludes10 rule(s)
Excludes20 note(s)
Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)