I25.6 — Silent myocardial ischemia
I25.6 is a billable, specific ICD-10-CM code for silent myocardial ischemia. It is valid for submission on a claim.
Risk adjustment
I25.6 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
I25.6 is named in 39 Medicare coverage policies — 39 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
- A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)
How I25.6 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 I25.6.
- Ischemia, ischemic›myocardium, myocardial›silent(asymptomatic)
- Disease, diseased›heart›ischemic›diagnosed on ECG or other special investigation, but currently presenting no symptoms
- Disease, diseased›heart›ischemic›silent
Related codes at this level
Codes that share I25. If I25.6 is not quite right, the correct code is usually one of these.
- I25.1Atherosclerotic heart disease of native coronary artery
- I25.2Old myocardial infarction
- I25.3Aneurysm of heart
- I25.4Coronary artery aneurysm and dissection
- I25.5Ischemic cardiomyopathy
- I25.7Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris
- I25.8Other forms of chronic ischemic heart disease
- I25.9Chronic ischemic heart disease, unspecified
Questions about I25.6
- Is I25.6 a billable ICD-10-CM code?
- Yes. I25.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I25.6 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Ischemic heart diseases (I20-I25).