Chapter IX
Diseases of the circulatory system
(I00-I99)

Rules Conventions GCS

Ischaemic heart diseases
(I20-I25)

Note:

For morbidity, duration as used in categories I21, I22, I24 and I25 refer to the interval elapsing between onset of the ischaemic episode and admission to care. For mortality, duration refers to the interval elapsing between onset and death.

Incl.:
with mention of hypertension ( I10-I15)
Coding-Hint
Use additional code, if desired, to identify presence of hypertension.

I20 Angina pectoris
DCS.IX.10

I20.0 Unstable angina
Incl.:
Angina:
  • crescendo
  • de novo effort
  • worsening effort
Intermediate coronary syndrome
Preinfarction syndrome
I20.1 Angina pectoris with documented spasm
Incl.:
Angina:
  • angiospastic
  • Prinzmetal
  • spasm-induced
  • variant
I20.8 Other forms of angina pectoris
DCS.IX.3
Incl.:
Angina of effort
Coronary slow flow syndrome
Stable angina
Stenocardia
I20.9 Angina pectoris, unspecified
Incl.:
Angina:
  • NOS
  • cardiac
Anginal syndrome
Ischaemic chest pain

I21 Acute myocardial infarction
DCS.IX.4 DCS.IX.5 DCS.IX.6 DFigure.IX.1 DCS.IX.10

Incl.:
myocardial infarction specified as acute or with a stated duration of 4 weeks (28 days) or less from onset
Excl.:
certain current complications following acute myocardial infarction ( I23.-)
myocardial infarction:
  • old (I25.2)
  • specified as chronic or with a stated duration of more than 4 weeks (more than 28 days) from onset (I25.8)
  • subsequent (I22.-)
postmyocardial infarction syndrome ( I24.1)
I21.0 Acute transmural myocardial infarction of anterior wall
Incl.:
Transmural infarction (acute)(of):
  • anterior (wall) NOS
  • anteroapical
  • anterolateral
  • anteroseptal
I21.1 Acute transmural myocardial infarction of inferior wall
Incl.:
Transmural infarction (acute)(of):
  • diaphragmatic wall
  • inferior (wall) NOS
  • inferolateral
  • inferoposterior
I21.2 Acute transmural myocardial infarction of other sites
Incl.:
Transmural infarction (acute)(of):
  • apical-lateral
  • basal-lateral
  • high lateral
  • lateral (wall) NOS
  • posterior (true)
  • posterobasal
  • posterolateral
  • posteroseptal
  • septal NOS
I21.3 Acute transmural myocardial infarction of unspecified site
Incl.:
Transmural myocardial infarction NOS
I21.4 Acute subendocardial myocardial infarction
Incl.:
Myocardial infarction with non-ST elevation
Nontransmural myocardial infarction NOS
I21.9 Acute myocardial infarction, unspecified
Incl.:
Myocardial infarction (acute) NOS

I22 Subsequent myocardial infarction
DCS.IX.4 DCS.IX.5 DCS.IX.6 DFigure.IX.1 DCS.IX.10

Note:
For morbidity coding, this category should be assigned for infarction of any myocardial site, occurring within 4 weeks (28 days) from onset of a previous infarction
Incl.:
myocardial infarction:
  • extension
  • recurrent
  • reinfarction
Excl.:
specified as chronic or with a stated duration of more than 4 weeks (more than 28 days) from onset ( I25.8)
I22.0 Subsequent myocardial infarction of anterior wall
Incl.:
Subsequent infarction (acute)(of):
  • anterior (wall) NOS
  • anteroapical
  • anterolateral
  • anteroseptal
I22.1 Subsequent myocardial infarction of inferior wall
Incl.:
Subsequent infarction (acute)(of):
  • diaphragmatic wall
  • inferior (wall) NOS
  • inferolateral
  • inferoposterior
I22.8 Subsequent myocardial infarction of other sites
Incl.:
Subsequent myocardial infarction (acute)(of):
  • apical-lateral
  • basal-lateral
  • high lateral
  • lateral (wall) NOS
  • posterior (true)
  • posterobasal
  • posterolateral
  • posteroseptal
  • septal NOS
I22.9 Subsequent myocardial infarction of unspecified site

I23 Certain current complications following acute myocardial infarction
DCS.IX.6 DFigure.IX.1 DCS.IX.10

Excl.:
the listed conditions, when:
  • concurrent with acute myocardial infarction (I21-I22)
  • not specified as current complications following acute myocardial infarction (I31.-, I51.-)
I23.0 Haemopericardium as current complication following acute myocardial infarction
I23.1 Atrial septal defect as current complication following acute myocardial infarction
I23.2 Ventricular septal defect as current complication following acute myocardial infarction
I23.3 Rupture of cardiac wall without haemopericardium as current complication following acute myocardial infarction
Excl.:
with haemopericardium ( I23.0)
I23.4 Rupture of chordae tendineae as current complication following acute myocardial infarction
I23.5 Rupture of papillary muscle as current complication following acute myocardial infarction
I23.6 Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
I23.8 Other current complications following acute myocardial infarction

I24 Other acute ischaemic heart diseases
DCS.IX.10

Excl.:
angina pectoris ( I20.-)
transient myocardial ischaemia of newborn ( P29.4)
I24.0 Coronary thrombosis not resulting in myocardial infarction
Incl.:
  • Coronary (artery)(vein):
    • embolism
    • occlusion
    • thromboembolism
  • not resulting in myocardial infarction
Excl.:
specified as chronic or with a stated duration of more than 4 weeks (more than 28 days) from onset ( I25.8)
I24.1 Dressler syndrome
Incl.:
Postmyocardial infarction syndrome
I24.8 Other forms of acute ischaemic heart disease
Incl.:
Coronary:
  • failure
  • insufficiency
I24.9 Acute ischaemic heart disease, unspecified
DCS.IX.4 DFigure.IX.1
Excl.:
ischaemic heart disease (chronic) NOS ( I25.9)

I25 Chronic ischaemic heart disease
DCS.IX.7 DFigure.IX.1 DCS.IX.10

Excl.:
cardiovascular disease NOS ( I51.6)
I25.0 Atherosclerotic cardiovascular disease, so described
DCS.IX.5
I25.1 Atherosclerotic heart disease
DCS.IX.5
Incl.:
Coronary (artery):
  • atheroma
  • atherosclerosis
  • disease
  • sclerosis
I25.2 Old myocardial infarction
Incl.:
Healed myocardial infarction
Past myocardial infarction diagnosed by ECG or other special investigation, but currently presenting no symptoms
I25.3 Aneurysm of heart
Incl.:
Aneurysm:
  • mural
  • ventricular
I25.4 Coronary artery aneurysm and dissection
Incl.:
Coronary arteriovenous fistula, acquired
Excl.:
congenital coronary (artery) aneurysm ( Q24.5)
I25.5 Ischaemic cardiomyopathy
I25.6 Silent myocardial ischaemia
I25.8 Other forms of chronic ischaemic heart disease
DCS.IX.4
Incl.:
Any condition in I21-I22 and I24.- specified as chronic or with a stated duration of more than 4 weeks (more than 28 days) from onset
I25.9 Chronic ischaemic heart disease, unspecified
Incl.:
Ischaemic heart disease (chronic) NOS