K57.00 — Diverticulitis of small intestine with perforation and abscess without bleeding
K57.00 is a billable, specific ICD-10-CM code for diverticulitis of small intestine with perforation and abscess without bleeding. It is valid for submission on a claim.
Excludes1 inherited from the categories above K57.00
These are not written on K57.00, but they bind it: a note on a category applies to every code beneath it. Billing K57.00 with anything listed here is a denial.
Excludes2 inherited from the categories above K57.00
Also inherited, and the opposite of Excludes1: these conditions are not part of K57.00, but a patient can have both, so you may code both.
Other codes that can never be billed with K57.00
These codes carry an Excludes1 note pointing at K57.00. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading K57.00 alone.
- K92.2Gastrointestinal hemorrhage, unspecified
Risk adjustment
K57.00 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.
Medicare coverage
K57.00 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A56456Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
- A56632Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
- A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy
How K57.00 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to K57.00.
- Perforation, perforated›diverticulum›small intestine
- Rupture, ruptured›diverticulum›small intestine
- Abscess›with›diverticular disease›small intestine
- Peritonitis›with or following›diverticular disease›small intestine
- Diverticulitis›intestine›small›with›abscess, perforation
Code history
K57.00 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share K57.0. If K57.00 is not quite right, the correct code is usually one of these.
Questions about K57.00
- Is K57.00 a billable ICD-10-CM code?
- Yes. K57.00 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does K57.00 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 K57.00?
- K57.00 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 K57.00 (K57.0, K57) and apply to it just the same.