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

Not billable

Is I22 billable?

No — I22 is a non-billable header code. I22 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 5 billable codes beneath I22.

Billable codes under this header

I22 at a glance

Code	I22
Description	Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes1 — never code together

The conditions below can never be reported together with I22 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

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

Use additional code

Report an additional code alongside I22 to fully describe the condition. I22 is sequenced first.

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 classified to I22.

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

Excludes2 — not included here — inherited from Chapter 9

The conditions below are not part of I22, but a patient may have both at the same time. When documentation supports it, I22 and the excluded code may both be reported.

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
systemic connective tissue disorders (M30-M36)
transient cerebral ischemic attacks and related syndromes (G45.-)

Code also — inherited from I20-I25

Two codes may be needed to describe the condition fully. Whether I22 is sequenced first depends on the reason for the encounter.

the presence of hypertension (I10-I1A)

What codes fall under I22? (5)

How long has I22 existed?

I22 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.