I21.09: ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
I21.09 is the billable ICD-10-CM diagnosis code for ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code I21.09?
I21.09 is the ICD-10-CM diagnosis code for ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall. It belongs to category I21 (Acute myocardial infarction).
Is I21.09 a billable code?
Yes. I21.09 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does I21.09 belong to?
I21.09 is part of ICD-10-CM category I21 — Acute myocardial infarction, which has 26 billable codes.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free