Is I22 a billable ICD-10-CM code?

No. I22 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I22 sit in the tabular list?

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

What cannot be coded together with I22?

I22 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I22

I22 — Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction

Non-billable headerICD-10-CM

I22 is a non-billable header ICD-10-CM code for subsequent st elevation (stemi) and non-st elevation (nstemi) myocardial infarction. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

subsequent myocardial infarction, type 2 (I21.A1)
subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9)

Use additional code

Add a secondary code to capture the detail described below.

code, if applicable, to identify:
exposure to environmental tobacco smoke (Z77.22)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Includes

Conditions this code covers.

acute myocardial infarction occurring within four weeks (28 days) of a previous acute myocardial infarction, regardless of site
cardiac infarction
coronary (artery) embolism
coronary (artery) occlusion
coronary (artery) rupture
coronary (artery) thrombosis
infarction of heart, myocardium, or ventricle
recurrent myocardial infarction
reinfarction of myocardium
rupture of heart, myocardium, or ventricle
subsequent type 1 myocardial infarction

Other codes that can never be billed with I22

These codes carry an Excludes1 note pointing at I22. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I22 alone.

I25.82Chronic total occlusion of coronary artery

Risk adjustment

I22 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 I22

5 child codes. Green means billable.

Questions about I22

Is I22 a billable ICD-10-CM code?: No. I22 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I22 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Ischemic heart diseases (I20-I25).
What cannot be coded together with I22?: I22 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.