K55.039 — Acute (reversible) ischemia of large intestine, extent unspecified
K55.039 is a billable, specific ICD-10-CM code for acute (reversible) ischemia of large intestine, extent unspecified. It is valid for submission on a claim.
Risk adjustment
K55.039 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
K55.039 is named in 13 Medicare coverage policies — 13 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56394Billing and Coding: Colonoscopy and Sigmoidoscopy-Diagnostic
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A56632Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
- A56747Billing and Coding: Magnetic Resonance Angiography (MRA)
How K55.039 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 K55.039.
- Colitis›subacute ischemic
- Colitis›thromboulcerative
- Disease, diseased›mesenteric embolic
- Embolism›intestine(artery) (vein) (with gangrene)
- Colitis›ischemic›acute(subacute)
- Colitis›ischemic›fulminant(acute)
- Disease, diseased›colon›ischemic
- Ischemia, ischemic›intestine›acute›large
Related codes at this level
Codes that share K55.03. If K55.039 is not quite right, the correct code is usually one of these.
Questions about K55.039
- Is K55.039 a billable ICD-10-CM code?
- Yes. K55.039 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does K55.039 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Other diseases of intestines (K55-K64).