I73.1 — Thromboangiitis obliterans [Buerger's disease]
I73.1 is a billable, specific ICD-10-CM code for thromboangiitis obliterans [buerger's disease]. It is valid for submission on a claim.
Excludes2 inherited from the categories above I73.1
Also inherited, and the opposite of Excludes1: these conditions are not part of I73.1, but a patient can have both, so you may code both.
Other codes that can never be billed with I73.1
These codes carry an Excludes1 note pointing at I73.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I73.1 alone.
- I96Gangrene, not elsewhere classified
Risk adjustment
I73.1 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
I73.1 is named in 23 Medicare coverage policies — 23 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52996Billing and Coding: Routine Foot Care
- A56232Billing and Coding: Foot Care
- A56459Billing and Coding: Debridement Services
How I73.1 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 I73.1.
- Buerger's disease(thromboangiitis obliterans)
- Thromboangiitis
- Disease, diseased›Buerger's(thromboangiitis obliterans)
- Gangrene, gangrenous›presenile
- Thromboangiitis›obliterans(general)
Code history
I73.1 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 I73. If I73.1 is not quite right, the correct code is usually one of these.
Questions about I73.1
- Is I73.1 a billable ICD-10-CM code?
- Yes. I73.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I73.1 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).