K55.049 — Acute infarction of large intestine, extent unspecified
K55.049 is a billable, specific ICD-10-CM code for acute infarction of large intestine, extent unspecified. It is valid for submission on a claim.
Risk adjustment
K55.049 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
K55.049 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
- A56682Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography
How K55.049 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 K55.049.
- Infarct, infarction›colon(acute) (agnogenic) (embolic) (hemorrhagic) (nonocclusive) (nonthrombotic) (occlusive) (segmental) (thrombotic) (with gangrene)
- Necrosis, necrotic›colon
- Infarct, infarction›intestine›large
Related codes at this level
Codes that share K55.04. If K55.049 is not quite right, the correct code is usually one of these.
Questions about K55.049
- Is K55.049 a billable ICD-10-CM code?
- Yes. K55.049 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does K55.049 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Other diseases of intestines (K55-K64).