NPI Atlas

ICD-10 Code for Diverticulosis

The default ICD-10-CM 2027 code for diverticulosis is K57.90 – Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding. More specific codes depend on the details documented, as listed in the official index (8 codes, 8 billable).

Main code: K57.90 – Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding
Billable: Yes

Index entries for Diverticulosis

with bleeding – K57.91
large intestine – K57.30
- with
  - bleeding – K57.31
  - small intestine – K57.50
    - with bleeding – K57.51
small intestine – K57.10
- with
  - bleeding – K57.11
  - large intestine – K57.50
    - with bleeding – K57.51

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.