I28.9 — Disease of pulmonary vessels, unspecified
I28.9 is a billable, specific ICD-10-CM code for disease of pulmonary vessels, unspecified. It is valid for submission on a claim.
Risk adjustment
I28.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 226 Heart Failure, Except End Stage and Acute0.360 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
I28.9 is named in 4 Medicare coverage policies — 4 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
- A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56625Billing and Coding: Echocardiography
- A56691Billing and Coding: Cardiac Computed Tomography & Angiography (CCTA)
How I28.9 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 I28.9.
- Disease, diseased›pulmonary›artery
Related codes at this level
Codes that share I28. If I28.9 is not quite right, the correct code is usually one of these.
Questions about I28.9
- Is I28.9 a billable ICD-10-CM code?
- Yes. I28.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I28.9 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Pulmonary heart disease and diseases of pulmonary circulation (I26-I28).