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I21.11 - ST elevation (STEMI) myocardial infarction involving right coronary artery


The ICD 10 Code for ST elevation (STEMI) myocardial infarction involving right coronary artery is listed as I21.11.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field Value
Diagnosis Code: I21.11
Description: ST elevation (STEMI) myocardial infarction involving right coronary artery
  • Inferoposterior transmural (Q wave) infarction (acute)
Diagnostic Related Groups
(MS-DRG v30.0)
222 - Cardiac Defib Implant W Cardiac Cath W Ami/hf/shock W Mcc
223 - Cardiac Defib Implant W Cardiac Cath W Ami/hf/shock W/o Mcc
224 - Cardiac Defib Implant W Cardiac Cath W/o Ami/hf/shock W Mcc
225 - Cardiac Defib Implant W Cardiac Cath W/o Ami/hf/shock W/o Mcc
226 - Cardiac Defibrillator Implant W/o Cardiac Cath W Mcc
227 - Cardiac Defibrillator Implant W/o Cardiac Cath W/o Mcc
280 - Acute Myocardial Infarction, Discharged Alive W Mcc
281 - Acute Myocardial Infarction, Discharged Alive W Cc
282 - Acute Myocardial Infarction, Discharged Alive W/o Cc/mcc
283 - Acute Myocardial Infarction, Expired W Mcc
284 - Acute Myocardial Infarction, Expired W Cc
285 - Acute Myocardial Infarction, Expired W/o Cc/mcc
Chapter Diseases of the circulatory system (I00-I99)
Block Ischemic heart diseases (I20-I25)
Parent I21.1 - ST elevation (STEMI) myocardial infarction of inferior wall
ICD-9-CM Diagnosis Codes General Equivalence Mappings (GEMS):
ICD 9 Dx Code: 410.31 - Acute myocardial infarction of inferoposterior wall, initial episode of care (approximate)
ICD-10-CM Siblings (same level / similar specificity) of I21.11:
I21.19 - ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall