I21.19

Billable

ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall

I21.19 is the ICD-10-CM code for ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
I00-I99
Parent
I21.1
Edition
FY2026

I00-I99 Diseases of the circulatory system

Includes

  • Acute transmural myocardial infarction of inferior wall
  • Inferolateral transmural (Q wave) infarction (acute)
  • Transmural (Q wave) infarction (acute) (of) diaphragmatic wall
  • Transmural (Q wave) infarction (acute) (of) inferior (wall) NOS

Excludes2 — not included here

  • ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery (I21.21)

Frequently asked questions

What is ICD-10 code I21.19?
I21.19 is the ICD-10-CM code for "ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall". It falls under I00-I99 Diseases of the circulatory system.
Is I21.19 a billable code?
Yes — I21.19 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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