ICD-10 Code for Diverticulosis
The ICD-10-CM code for diverticulosis is K57.90 — Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding. This is the code the Alphabetic Index gives for diverticulosis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
K57.90 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which diverticulosis code should you use?
The Alphabetic Index lists 8 codes under Diverticulosis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| with bleeding | K57.91 | Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding | |
| large intestine | K57.30 | Diverticulosis of large intestine without perforation or abscess without bleeding | |
| small intestine | K57.10 | Diverticulosis of small intestine without perforation or abscess without bleeding |
Diverticulosis large intestine
| with › bleeding | K57.31 | Diverticulosis of large intestine without perforation or abscess with bleeding | |
| with › small intestine | K57.50 | Diverticulosis of both small and large intestine without perforation or abscess without bleeding | |
| with › small intestine › with bleeding | K57.51 | Diverticulosis of both small and large intestine without perforation or abscess with bleeding |
Diverticulosis small intestine
| with › bleeding | K57.11 | Diverticulosis of small intestine without perforation or abscess with bleeding | |
| with › large intestine | K57.50 | Diverticulosis of both small and large intestine without perforation or abscess without bleeding | |
| with › large intestine › with bleeding | K57.51 | Diverticulosis of both small and large intestine without perforation or abscess with bleeding |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources