{"code":"I22.9","type":"code","title":"Subsequent ST elevation (STEMI) myocardial infarction of unspecified site","codeAlso":["the presence of hypertension (I10-I1A)"],"includes":["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"],"modern_v":"official26","codeFirst":[],"excludes1":["subsequent myocardial infarction, type 2 (I21.A1)","subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true},"sibling_codes":["I22","I22.0","I22.1","I22.2","I22.8"],"inclusionTerms":["Subsequent acute myocardial infarction of unspecified site","Subsequent myocardial infarction (acute) NOS"],"sibling_titles":{"code":"I22.8","title":"Subsequent ST elevation (STEMI) myocardial infarction of other sites","isBillable":true},"useAdditionalCode":["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)"],"clinicalDefinition":"Subsequent ST elevation (STEMI) myocardial infarction of unspecified site is a billable ICD-10-CM diagnosis code (I22.9).","officialDefinition":"Subsequent ST elevation (STEMI) myocardial infarction of unspecified site is a billable ICD-10-CM diagnosis code (I22.9). Includes: 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. Inclusion terms: Subsequent acute myocardial infarction of unspecified site; Subsequent myocardial infarction (acute) NOS. Excludes1 (not coded here): subsequent myocardial infarction, type 2 (I21.A1); subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9). 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). Code also: the presence of hypertension (I10-I1A).","seventhCharacterInstructions":[],"workflowProtocols":[],"guidelines":{"whenToUse":[],"whenNotToUse":[],"commonBillingMistakes":[],"codeComparisons":[],"documentationChecklist":[]},"domainLandscape":{"summary":"Primary diagnostic domain and clinical landscape evaluation.","keyCategories":[],"diagnosticContinuum":"Progression continuum from acute presentation to resolution."},"children":[],"hierarchy":[],"relatedCodes":[],"relevantCPTCodes":[],"documentationTips":[],"caseStudies":[],"description":"","overview":""}