ICD-10-CM I21: Acute myocardial infarction

• cardiac infarction
• coronary (artery) embolism
• coronary (artery) occlusion
• coronary (artery) rupture
• coronary (artery) thrombosis
• infarction of heart, myocardium, or ventricle
• myocardial infarction specified as acute or with a stated duration of 4 weeks (28 days) or less from onset

• old myocardial infarction (I25.2)
• postmyocardial infarction syndrome (I24.1)
• subsequent type 1 myocardial infarction (I22.-)

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

• , if applicable, the underlying cause, such as:
• anemia (D50.0-D64.9)
• chronic obstructive pulmonary disease (J44.-)
• paroxysmal tachycardia (I47.0-I47.9)
• shock (R57.0-R57.9)

, if applicable, postprocedural myocardial infarction following cardiac surgery (I97.190), or postprocedural myocardial infarction during cardiac surgery (I97.790)

• 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)

Type 1 ST elevation myocardial infarction of anterior wall

ST elevation (STEMI) myocardial infarction involving diagonal coronary artery

• Acute transmural myocardial infarction of anterior wall
• Anteroapical transmural (Q wave) infarction (acute)
• Anterolateral transmural (Q wave) infarction (acute)
• Anteroseptal transmural (Q wave) infarction (acute)
• Transmural (Q wave) infarction (acute) (of) anterior (wall) NOS

Type 1 ST elevation myocardial infarction of inferior wall

Inferoposterior transmural (Q wave) infarction (acute)

• 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

Type 1 ST elevation myocardial infarction of other sites

ST elevation (STEMI) myocardial infarction involving oblique marginal coronary artery

• Acute transmural myocardial infarction of other sites
• Apical-lateral transmural (Q wave) infarction (acute)
• Basal-lateral transmural (Q wave) infarction (acute)
• High lateral transmural (Q wave) infarction (acute)
• Lateral (wall) NOS transmural (Q wave) infarction (acute)
• Posterior (true) transmural (Q wave) infarction (acute)
• Posterobasal transmural (Q wave) infarction (acute)
• Posterolateral transmural (Q wave) infarction (acute)
• Posteroseptal transmural (Q wave) infarction (acute)
• Septal transmural (Q wave) infarction (acute) NOS

• Acute transmural myocardial infarction of unspecified site
• Transmural (Q wave) myocardial infarction NOS
• Type 1 ST elevation myocardial infarction of unspecified site

• Acute subendocardial myocardial infarction
• Non-Q wave myocardial infarction NOS
• Nontransmural myocardial infarction NOS
• Type 1 non-ST elevation myocardial infarction

Myocardial infarction (acute) NOS

• Myocardial infarction due to demand ischemia
• Myocardial infarction secondary to ischemic imbalance

• Myocardial infarction associated with revascularization procedure
• Myocardial infarction type 3
• Myocardial infarction type 4a
• Myocardial infarction type 4b
• Myocardial infarction type 4c
• Myocardial infarction type 5

• Myocardial infarction with coronary microvascular disease
• Myocardial infarction with nonobstructive coronary arteries [MINOCA] with microvascular disease

• complication, if known and applicable, such as:
• (acute) stent occlusion (T82.897-)
• (acute) stent stenosis (T82.855-)
• (acute) stent thrombosis (T82.867-)
• cardiac arrest due to underlying cardiac condition (I46.2)
• complication of percutaneous coronary intervention (PCI) (I97.89)
• occlusion of coronary artery bypass graft (T82.218-)