I21.21 ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
Instructional Notes:
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I21.21
Description: ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
Inclusion Term:
- ST elevation (STEMI) myocardial infarction involving oblique marginal coronary artery
↓
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I21.2
Description: ST elevation (STEMI) myocardial infarction of other sites
Inclusion Term:
- Type 1 ST elevation myocardial infarction of other sites
↓
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I21
Description: Acute myocardial infarction
Exclude2:
- old myocardial infarction (I25.2)
- postmyocardial infarction syndrome (I24.1)
- subsequent type 1 myocardial infarction (I22.-)
Use Additional Code:
- 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)
Include:
- 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
↓
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I20-I25
Description: Ischemic heart diseases (I20-I25)
Code Also: ['the presence of hypertension (I10-I1A)']
↓
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I00-I99
Description: Diseases of the circulatory system
Exclude2:
- 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.-)