I25.85 — Chronic coronary microvascular dysfunction
I25.85 is a billable, specific ICD-10-CM code for chronic coronary microvascular dysfunction. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Chronic (presentation of) coronary microvascular disease
- Coronary microvascular dysfunction NOS
Excludes2 inherited from the categories above I25.85
Also inherited, and the opposite of Excludes1: these conditions are not part of I25.85, but a patient can have both, so you may code both.
Written on I25 — Chronic ischemic heart disease
- non-ischemic myocardial injury (I5A)
Risk adjustment
I25.85 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
I25.85 is named in 25 Medicare coverage policies — 25 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
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A53775Billing and Coding: Frequency and Duration for Cardiac Rehabilitation and Intensive Cardiac Rehabilitation
- A56476Billing and Coding: Cardiac Radionuclide Imaging
How I25.85 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 I25.85.
- Dysfunction›coronary microvascular
- Dysfunction›chronic›coronary microvascular
- Dysfunction›coronary microvascular›chronic
- Disease, diseased›coronary›microvascular›chronic
Code history
I25.85 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 I25.8. If I25.85 is not quite right, the correct code is usually one of these.
Questions about I25.85
- Is I25.85 a billable ICD-10-CM code?
- Yes. I25.85 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I25.85 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Ischemic heart diseases (I20-I25).