I21.19

ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall

Billable / specificHCC V28 228

I21.19 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • 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

Includes (from I21)

  • 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

Excludes2

Not included here — may be reported together when both conditions exist.

  • ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery (I21.21)
  • certain conditions originating in the perinatal period (P04-P96) (from I21)
  • certain infectious and parasitic diseases (A00-B99) (from I21)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A) (from I21)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) (from I21)
  • endocrine, nutritional and metabolic diseases (E00-E88) (from I21)
  • injury, poisoning and certain other consequences of external causes (S00-T88) (from I21)
  • neoplasms (C00-D49) (from I21)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from I21)
  • systemic connective tissue disorders (M30-M36) (from I21)
  • transient cerebral ischemic attacks and related syndromes (G45.-) (from I21)
  • old myocardial infarction (I25.2) (from I21)
  • postmyocardial infarction syndrome (I24.1) (from I21)
  • subsequent type 1 myocardial infarction (I22.-) (from I21)

Use additional code

Add a code to identify the following, if applicable.

  • code, if applicable, to identify: (from I21)
  • exposure to environmental tobacco smoke (Z77.22) (from I21)
  • history of tobacco dependence (Z87.891) (from I21)
  • occupational exposure to environmental tobacco smoke (Z57.31) (from I21)
  • status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82) (from I21)
  • tobacco dependence (F17.-) (from I21)
  • tobacco use (Z72.0) (from I21)

Code also

An additional code may be needed.

  • the presence of hypertension (I10-I1A) (from I21)

Also known as

  • 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
  • Infarct, infarction, myocardium, myocardial, ST elevation, inferiorNEC
  • Infarct, infarction, myocardium, myocardial, transmural, inferiorNEC

Parent code

  • I21.1ST elevation (STEMI) myocardial infarction of inferior wallHeader

Related codes

  • I21.11ST elevation (STEMI) myocardial infarction involving right coronary arteryBillable

Browse