K55.1Chronic vascular disorders of intestine

K55.1 is the ICD-10-CM diagnosis code for chronic vascular disorders of intestine. It belongs to category K55 (vascular disorders of intestine), block K55-K64 (other diseases of intestines) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

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.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 557.1 (chronic vascular insufficiency of intestine).