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Table 1 Coding frame for coronary heart disease, 1931 to 2005

From: Patterns of coronary heart disease mortality over the 20th century in England and Wales: Possible plateaus in the rate of decline

ICD revision ICD code Primary description Secondary description
ICD-4 94 Diseases of the coronary arteries, Angina pectoris  
ICD-5 94b Angina pectoris without mention of coronary disease  
ICD-5 94a Diseases of the coronary arteries  
ICD-6 4202 Arteriosclerotic heart disease, including coronary disease Angina pectoris without mention of coronary disease
ICD-6 4201 Arteriosclerotic heart disease, including coronary disease Heart disease specified as involving coronary arteries
ICD-6 4200 Arteriosclerotic heart disease, including coronary disease Arteriosclerotic heart disease so described
ICD-7 4202 Arteriosclerotic heart disease, including coronary disease Angina pectoris without mention of coronary disease
ICD-7 4201 Arteriosclerotic heart disease, including coronary disease Heart disease specified as involving coronary arteries
ICD-7 4200 Arteriosclerotic heart disease, including coronary disease Artetriosclerotic heart disease so described
ICD-8 4149 Asymptomatic ischaemic heart disease Without mention of hypertensive disease
ICD-8 4140 Asymptomatic ischaemic heart disease With hypertensive disease
ICD-8 4139 Angina pectoris Without mention of hypertensive disease
ICD-8 4130 Angina pectoris With hypertensive disease
ICD-8 4129 Chronic ischaemic heart disease Other endocardial structures
ICD-8 4124 Chronic ischaemic heart disease Cardiovascular disease without mention of hypertension or chronic ischaemic heart disease
ICD-8 4123 Chronic ischaemic heart disease Chronic ischaemic heart disease with no mention of hypertension
ICD-8 4122 Chronic ischaemic heart disease Cardiovascular disease with hypertension but no mention of chronic ischaemic heart disease
ICD-8 4121 Chronic ischaemic heart disease Chronic ischaemic heart disease with hypertension
ICD-8 4120 Chronic ischaemic heart disease Chronic ischaemic heart disease
ICD-8 4119 Other acute and sub-acute forms of ischaemic heart disease Without mention of hypertensive disease
ICD-8 4110 Other acute and sub-acute forms of ischaemic heart disease With hypertensive disease
ICD-8 4109 Acute myocardial infarction Without mention of hypertensive disease
ICD-8 4100 Acute myocardial infarction With hypertensive disease
ICD-9 4149 Other forms of chronic ischaemic heart disease Unspecified
ICD-9 4148 Other forms of chronic ischaemic heart disease Other
ICD-9 4141 Other forms of chronic ischaemic heart disease Aneurysm of heart
ICD-9 4140 Other forms of chronic ischaemic heart disease Coronary atherosclerosis
ICD-9 4130 Angina pectoris Angina pectoris
ICD-9 4120 Old myocardial infarction Old myocardial infarction
ICD-9 4110 Other acute and subacute forms of ischaemic heart disease Other acute and subacute forms of ischaemic heart disease
ICD-9 4100 Acute myocardial infarction Acute myocardial infarction
ICD-10 I20 Angina pectoris  
ICD-10 I21 Acute myocardial infarction (AMI)  
ICD-10 I22 Subsequent myocardial infarction  
ICD-10 I23 Certain current complications following AMI  
ICD-10 I24 Other acute ischaemic diseases  
ICD-10 I25 Chronic ischaemic heart disease