K55: Vascular disorders of intestine

Codes under K55 (Vascular disorders of intestine). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
K55.0	Acute vascular disorders of intestine	—
K55.01	Acute (reversible) ischemia of small intestine	—
K55.1	Chronic vascular disorders of intestine	✓
K55.02	Acute infarction of small intestine	—
K55.2	Angiodysplasia of colon	—
K55.03	Acute (reversible) ischemia of large intestine	—
K55.3	Necrotizing enterocolitis	—
K55.04	Acute infarction of large intestine	—
K55.05	Acute (reversible) ischemia of intestine, part unspecified	—
K55.06	Acute infarction of intestine, part unspecified	—
K55.8	Other vascular disorders of intestine	✓
K55.9	Vascular disorder of intestine, unspecified	✓
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	✓
K55.20	Angiodysplasia of colon without hemorrhage	✓
K55.021	Focal (segmental) acute infarction of small intestine	✓
K55.21	Angiodysplasia of colon with hemorrhage	✓
K55.022	Diffuse acute infarction of small intestine	✓
K55.029	Acute infarction of small intestine, extent unspecified	✓
K55.30	Necrotizing enterocolitis, unspecified	✓
K55.031	Focal (segmental) acute (reversible) ischemia of large intestine	✓
K55.31	Stage 1 necrotizing enterocolitis	✓
K55.032	Diffuse acute (reversible) ischemia of large intestine	✓
K55.32	Stage 2 necrotizing enterocolitis	✓
K55.33	Stage 3 necrotizing enterocolitis	✓
K55.039	Acute (reversible) ischemia of large intestine, extent unspecified	✓
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	✓
K55.051	Focal (segmental) acute (reversible) ischemia of intestine, part unspecified	✓
K55.052	Diffuse acute (reversible) ischemia of intestine, part unspecified	✓
K55.059	Acute (reversible) ischemia of intestine, part and extent unspecified	✓
K55.061	Focal (segmental) acute infarction of intestine, part unspecified	✓
K55.062	Diffuse acute infarction of intestine, part unspecified	✓
K55.069	Acute infarction of intestine, part and extent unspecified	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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