Is K55.059 a billable ICD-10-CM code?

Yes. K55.059 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does K55.059 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 K55.059?

K55.059 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 K55.059 (K55) and apply to it just the same.

K55.059

K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified

Billable / specific codeICD-10-CM

K55.059 is a billable, specific ICD-10-CM code for acute (reversible) ischemia of intestine, part and extent unspecified. It is valid for submission on a claim.

Excludes1 inherited from the categories above K55.059

These are not written on K55.059, but they bind it: a note on a category applies to every code beneath it. Billing K55.059 with anything listed here is a denial.

Written on K55 — Vascular disorders of intestine

necrotizing enterocolitis of newborn (P77.-)

Excludes2 inherited from the categories above K55.059

Also inherited, and the opposite of Excludes1: these conditions are not part of K55.059, but a patient can have both, so you may code both.

Written on K55 — Vascular disorders of intestine

angioectasia (angiodysplasia) duodenum (K31.81-)

Risk adjustment

K55.059 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

K55.059 is named in 19 Medicare coverage policies — 19 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56389Billing and Coding: Upper Gastrointestinal Endoscopy and Visualization
A56421Billing and Coding: CT of the Abdomen and Pelvis
A56632Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
A56727Billing and Coding: Wireless Capsule Endoscopy

How K55.059 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 K55.059.

Embolism›mesenteric(artery) (vein) (with gangrene)
Enterocolitis›fulminant ischemic
Enterocolitis›hemorrhagic(acute)
Enteropathy›hemorrhagic, terminal
Ischemia, ischemic›mesenteric, acute
Narrowing›mesenteric artery
Embolism›artery›mesenteric(with gangrene)
Ischemia, ischemic›bowel›acute
Ischemia, ischemic›intestine›acute
Insufficiency, insufficient›vascular›intestine›acute

Code history

K55.059 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 K55.05. If K55.059 is not quite right, the correct code is usually one of these.

Questions about K55.059

Is K55.059 a billable ICD-10-CM code?: Yes. K55.059 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does K55.059 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 K55.059?: K55.059 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 K55.059 (K55) and apply to it just the same.