K55.1 Chronic vascular disorders of intestine

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Chronic ischemic colitis
• Chronic ischemic enteritis
• Chronic ischemic enterocolitis
• Ischemic stricture of intestine
• Mesenteric atherosclerosis
• Mesenteric vascular insufficiency

Applies from K55 Vascular disorders of intestine

Excludes1 (never code together)

• necrotizing enterocolitis of newborn (P77.-)

Excludes2 (not included here)

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

Risk adjustment (HCC)

• CMS-HCC V22: HCC 108 — Vascular Disease
• ESRD V24: HCC 108

MS-DRG index

Defines the logic of DRG(s) 393-395 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 557.1 Chronic vascular insufficiency of intestine

Code annotations containing back-references to K55.1

Back-references to K55.1

• Type 2 Excludes: I70 Atherosclerosis ("mesenteric atherosclerosis (K55.1)")
• Type 1 Excludes: K56 Paralytic ileus and intestinal obstruction without hernia ("ischemic stricture of intestine (K55.1)")

Diagnosis Index entries for K55.1

• Abdomen, abdominal › angina
• Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) › abdominal
• Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) › intestinal
• Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) › mesenteric
• Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification) › mesenteric (artery)
• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › ischemic › chronic
• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › ischemic › due to mesenteric artery insufficiency
• Disease, diseased › Wilkie's
• Disorder (of) › intestine, intestinal › vascular › chronic
• Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › ischemic › chronic
• Enterocolitis › hemorrhagic (acute) › chronic
• Insufficiency, insufficient › arterial › mesenteric
• Insufficiency, insufficient › mesenteric
• Insufficiency, insufficient › vascular › mesenteric
• Ischemia, ischemic › bowel (transient) › chronic
• Ischemia, ischemic › bowel (transient) › due to mesenteric artery insufficiency
• Ischemia, ischemic › colon chronic (due to mesenteric artery insufficiency)
• Ischemia, ischemic › intestine (large) (small) (transient) › chronic
• Ischemia, ischemic › intestine (large) (small) (transient) › due to mesenteric artery insufficiency
• Ischemia, ischemic › small bowel › chronic
• Ischemia, ischemic › small bowel › due to mesenteric artery insufficiency
• Stricture › intestine › ischemic
• Syndrome › ischemic › bowel (transient) › chronic
• Syndrome › ischemic › bowel (transient) › due to mesenteric artery insufficiency
• Syndrome › mesenteric › artery (superior)
• Syndrome › mesenteric › vascular insufficiency
• Syndrome › superior › mesenteric artery
• Syndrome › Wilkie's
• Wilkie's disease or syndrome

Nearby codes

• K55.059 Acute (reversible) ischemia of intestine, part and extent unspecified
• K55.06 Acute infarction of intestine, part 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
• K55.1 Chronic vascular disorders of intestine (this code)
• K55.2 Angiodysplasia of colon
• K55.20 Angiodysplasia of colon without hemorrhage
• K55.21 Angiodysplasia of colon with hemorrhage
• K55.3 Necrotizing enterocolitis
• K55.30 Necrotizing enterocolitis, unspecified