K55.1

Billable
ChapterK00–K95
Ranksubcategory
Official Description

Chronic vascular disorders of intestine

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).

Instructional Notes

Includes
  • Chronic ischemic colitis
  • Chronic ischemic enteritis
  • Chronic ischemic enterocolitis
  • Ischemic stricture of intestine
  • Mesenteric atherosclerosis
  • Mesenteric vascular insufficiency
General instructions are available for the parent sections:
View CH11 NotesView K55 Notes

Clinical Hierarchy

CH11Diseases of the digestive system (K00-K95)
K55-K64Other diseases of intestines (K55-K64)
K55Vascular disorders of intestine
K55.1Chronic vascular disorders of intestine

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K55.1:

categoryK55
Vascular disorders of intestine
View context instructions
chapterCH11
Diseases of the digestive system (K00-K95)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to K55.1. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Abdomen, abdominal1 unique routes
angina→K55.1
Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)3 unique routes
abdominal→K55.1
intestinal→K55.1
mesenteric→K55.1
Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification)1 unique routes
mesenteric (artery)→K55.1
Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)2 unique routes
ischemic(2 variants)
chronic→K55.1
due to mesenteric artery insufficiency→K55.1
Disease, diseased1 unique routes
Wilkie's→K55.1
Disorder (of)1 unique routes
intestine, intestinal
vascular
chronic→K55.1
Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective)1 unique routes
ischemic
chronic→K55.1
Enterocolitis1 unique routes
hemorrhagic (acute)
chronic→K55.1
Insufficiency, insufficient3 unique routes
arterial
mesenteric→K55.1
mesenteric→K55.1
vascular
mesenteric→K55.1
Ischemia, ischemic7 unique routes
bowel (transient)(2 variants)
chronic→K55.1
due to mesenteric artery insufficiency→K55.1
colon chronic (due to mesenteric artery insufficiency)→K55.1
intestine (large) (small) (transient)(2 variants)
chronic→K55.1
due to mesenteric artery insufficiency→K55.1
small bowel(2 variants)
chronic→K55.1
due to mesenteric artery insufficiency→K55.1
Stricture1 unique routes
intestine
ischemic→K55.1
Syndrome3 unique routes
ischemic(2 variants)
bowel (transient)(2 variants)
chronic→K55.1
due to mesenteric artery insufficiency→K55.1
Wilkie's→K55.1

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 393
Other Digestive System Diagnoses with MCC
DRG 394
Other Digestive System Diagnoses with CC
DRG 395
Other Digestive System Diagnoses without CC/MCC

Cross Reference

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