I77.5 — Necrosis of artery
I77.5 is a billable, specific ICD-10-CM code for necrosis of artery. It is valid for submission on a claim.
Risk adjustment
I77.5 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
I77.5 is named in 12 Medicare coverage policies — 12 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56747Billing and Coding: Magnetic Resonance Angiography (MRA)
- A56747Billing and Coding: Magnetic Resonance Angiography (MRA)
- A56747Billing and Coding: Magnetic Resonance Angiography (MRA)
- A56775Billing and Coding: Magnetic Resonance Angiography
How I77.5 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 I77.5.
- Arteriolitis›necrotizing, kidney
- Necrosis, necrotic›artery
Related codes at this level
Codes that share I77. If I77.5 is not quite right, the correct code is usually one of these.
- I77.0Arteriovenous fistula, acquired
- I77.1Stricture of artery
- I77.2Rupture of artery
- I77.3Arterial fibromuscular dysplasia
- I77.4Celiac artery compression syndrome
- I77.6Arteritis, unspecified
- I77.7Other arterial dissection
- I77.8Other specified disorders of arteries and arterioles
- I77.9Disorder of arteries and arterioles, unspecified
Questions about I77.5
- Is I77.5 a billable ICD-10-CM code?
- Yes. I77.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I77.5 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).