ICD-10-CM 2027
ICD-10 code for colon chronic ischemia
From the official ICD-10-CM alphabetic index entry “Ischemia, ischemic › colon chronic (due to mesenteric artery insufficiency)”. Page updated September 29, 2026.
About coding colon chronic ischemia
The ICD-10-CM code for colon chronic ischemia is K55.1 (Chronic vascular disorders of intestine).
Within K55 (vascular disorders of intestine), K55.1 is specifically for chronic vascular disorders of intestine. Related codes cover acute vascular disorders of intestine (K55.0), Angiodysplasia of colon (K55.2), necrotizing enterocolitis (K55.3), other vascular disorders of intestine (K55.8) and vascular disorder of intestine, unspecified (K55.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about colon chronic ischemia ICD-10 codes
What is the ICD-10 code for colon chronic ischemia?
- K55.1 — Chronic vascular disorders of intestine.
Is K55.1 billable?
- Yes. K55.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K55.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K55.1 as a principal diagnosis.
Is K55.1 a CC or MCC?
- K55.1 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.