Is I25 a billable ICD-10-CM code?

No. I25 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I25 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Ischemic heart diseases (I20-I25).

I25

I25 — Chronic ischemic heart disease

Non-billable headerICD-10-CM

I25 is a non-billable header ICD-10-CM code for chronic ischemic heart disease. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

non-ischemic myocardial injury (I5A)

Use additional code

Add a secondary code to capture the detail described below.

code to identify:
chronic total occlusion of coronary artery (I25.82)
exposure to environmental tobacco smoke (Z77.22)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Other codes that can never be billed with I25

These codes carry an Excludes1 note pointing at I25. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I25 alone.

T86.290Cardiac allograft vasculopathy
I20Angina pectoris
I24.0Acute coronary thrombosis not resulting in myocardial infarction
I24.9Acute ischemic heart disease, unspecified
I25.7Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris
I25.75Atherosclerosis of native coronary artery of transplanted heart with angina pectoris
I25.76Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris
I25.810Atherosclerosis of coronary artery bypass graft(s) without angina pectoris

Risk adjustment

I25 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.

Code to one of these instead I25

9 child codes. Green means billable.

Questions about I25

Is I25 a billable ICD-10-CM code?: No. I25 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I25 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Ischemic heart diseases (I20-I25).