I82.91 — Chronic embolism and thrombosis of unspecified vein
I82.91 is a billable, specific ICD-10-CM code for chronic embolism and thrombosis of unspecified vein. It is valid for submission on a claim.
Risk adjustment
I82.91 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
I82.91 is named in 10 Medicare coverage policies — 10 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A55717Billing and Coding: Lab: Flow Cytometry
- A56464Billing and Coding: Flow Cytometry
- A56541Billing and Coding: Biomarkers Overview
- A56697Billing and Coding: Non-Invasive Vascular Studies
How I82.91 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 I82.91.
- Thrombosis, thrombotic›chronic
- Embolism›vein›chronic
- Thrombosis, thrombotic›vein›chronic
Related codes at this level
Codes that share I82.9. If I82.91 is not quite right, the correct code is usually one of these.
Questions about I82.91
- Is I82.91 a billable ICD-10-CM code?
- Yes. I82.91 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I82.91 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89).