K57.4 — Diverticulitis of both small and large intestine with perforation and abscess
K57.4 is a non-billable header ICD-10-CM code for diverticulitis of both small and large intestine with perforation and abscess. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 inherited from the categories above K57.4
These are not written on K57.4, but they bind it: a note on a category applies to every code beneath it. Billing K57.4 with anything listed here is a denial.
Excludes2 inherited from the categories above K57.4
Also inherited, and the opposite of Excludes1: these conditions are not part of K57.4, but a patient can have both, so you may code both.
Other codes that can never be billed with K57.4
These codes carry an Excludes1 note pointing at K57.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading K57.4 alone.
Risk adjustment
K57.4 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
K57.4 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead K57.4
2 child codes. Green means billable.
Related codes at this level
Codes that share K57. If K57.4 is not quite right, the correct code is usually one of these.
- K57.0Diverticulitis of small intestine with perforation and abscess
- K57.1Diverticular disease of small intestine without perforation or abscess
- K57.2Diverticulitis of large intestine with perforation and abscess
- K57.3Diverticular disease of large intestine without perforation or abscess
- K57.5Diverticular disease of both small and large intestine without perforation or abscess
- K57.8Diverticulitis of intestine, part unspecified, with perforation and abscess
- K57.9Diverticular disease of intestine, part unspecified, without perforation or abscess
Questions about K57.4
- Is K57.4 a billable ICD-10-CM code?
- No. K57.4 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does K57.4 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Other diseases of intestines (K55-K64).
- What cannot be coded together with K57.4?
- K57.4 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above K57.4 (K57) and apply to it just the same.