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. 2006 Dec;21(12):1215–1221. doi: 10.1111/j.1525-1497.2006.00591.x

Table 1.

ICD-9 Codes and Pharmacy Codes Used to Identify Participants for the Health Literacy and Cardiovascular Disease Medication Refill Adherence Study

ICD-9 Codes Pharmacy Codes
Hypertension 401 Essential hypertension Hypotensives, vasodilators
402 Hypertensive heart disease Hypotensives, sympatholytic
402.0 Hypertensive heart disease, malignant Hypotensives, ganglionic blockers
402.1 Hypertensive heart disease, benign Hypotensives, angiotensin converting enzyme blocker
402.9 Hypertensive heart disease, unspecified Hypotensives, veratrum alkaloids
403.0 Hypertensive renal disease, malignant Hypotensives, angiotensin receptor antagonist
403.1 Hypertensive renal disease, benign Hypotensives, miscellaneous
403.9 Hypertensive renal disease, unspecified Calcium channel blocking agents
404.0 Hypertensive heart and renal disease, malignant α/β-adrenergic blocking agents
404.1 Hypertensive heart and renal disease, benign α-adrenergic blocking agents
404.9 Hypertensive heart and renal disease, unspecified β-adrenergic blocking agents
405.0 Secondary hypertension, malignant Thiazide and related diuretics
405.1 Secondary hypertension, benign Loop diuretics
405.9 Secondary hypertension, unspecified Potassium sparing diuretics in combination
Potassium sparing diuretics
Miscellaneous diuretics
Coronary heart disease 410* Acute myocardial infarction Vasodilators, coronary
411* Other acute and subacute forms of ischemic heart disease Platelet aggregation inhibitors
412* Old myocardial infarction
414* Other forms of chronic ischemic heart disease
Diabetes 250* Diabetes mellitus Oral hypoglycemic agents, sulfonylurea type
Only included if oral anti-diabetic medication Oral hypoglycemic agents, non-sulfonylurea type
Hyperlipidemia 272.0 Pure hypercholesterolemia Bile salt sequestrants
272.1 Pure hyperglyceridemia Lipotropics
272.2 Mixed hyperlipidemia
272.3 Hyperchylomicronemia
272.4 Other and unspecified hyperlipidemia
272.5 Lipoprotein deficiencies
*

Wild card, all decimals included.