ICD-10-CM category
K55 Vascular disorders of intestine
K55 is a category, not a billable code. Report one of the 27 complete codes below.
Codes in K55
- K55.011Focal (segmental) acute (reversible) ischemia of small intestine
- K55.012Diffuse acute (reversible) ischemia of small intestine
- K55.019Acute (reversible) ischemia of small intestine, extent unspecified
- K55.021Focal (segmental) acute infarction of small intestine
- K55.022Diffuse acute infarction of small intestine
- K55.029Acute infarction of small intestine, extent unspecified
- K55.031Focal (segmental) acute (reversible) ischemia of large intestine
- K55.032Diffuse acute (reversible) ischemia of large intestine
- K55.039Acute (reversible) ischemia of large intestine, extent unspecified
- K55.041Focal (segmental) acute infarction of large intestine
- K55.042Diffuse acute infarction of large intestine
- K55.049Acute infarction of large intestine, extent unspecified
- K55.051Focal (segmental) acute (reversible) ischemia of intestine, part unspecified
- K55.052Diffuse acute (reversible) ischemia of intestine, part unspecified
- K55.059Acute (reversible) ischemia of intestine, part and extent unspecified
- K55.061Focal (segmental) acute infarction of intestine, part unspecified
- K55.062Diffuse acute infarction of intestine, part unspecified
- K55.069Acute infarction of intestine, part and extent unspecified
- K55.1Chronic vascular disorders of intestine
- K55.20Angiodysplasia of colon without hemorrhage
- K55.21Angiodysplasia of colon with hemorrhage
- K55.30Necrotizing enterocolitis, unspecified
- K55.31Stage 1 necrotizing enterocolitis
- K55.32Stage 2 necrotizing enterocolitis
- K55.33Stage 3 necrotizing enterocolitis
- K55.8Other vascular disorders of intestine
- K55.9Vascular disorder of intestine, unspecified
Outside the US? K55 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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