K57.91Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding

K57.91 is the ICD-10-CM diagnosis code for Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding. It belongs to category K57 (Diverticular disease 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 K57.9, choose K57.91 (Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding) only when documentation doesn't support a more specific option: Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding (K57.90), Diverticulitis of intestine, part unspecified, without perforation or abscess without bleeding (K57.92) and Diverticulitis of intestine, part unspecified, without perforation or abscess with bleeding (K57.93).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" 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 377 (Gastrointestinal Hemorrhage with MCC, relative weight 1.8127), DRG 378 (Gastrointestinal Hemorrhage with CC, relative weight 0.9732) and DRG 379 (Gastrointestinal Hemorrhage without CC/MCC, relative weight 0.6381), 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 562.12 (Diverticulosis of colon with hemorrhage).