Appendix Table 2. International Classification of Diseases, Ninth Revision, Code Criteria for Comorbidity and Coronary Heart Disease (CHD) Risk Factors Used to Construct the National Cholesterol Education Program Guideline Concordance Algorithm*
Coronary heart disease410.xx, Acute myocardial infarction
411.xx, Other acute and subacute forms of ischemic heart disease
412, Old myocardial infarction
413.x, Angina pectoris
414.xx, Other forms of chronic ischemic heart disease
429, Ill-defined descriptions and complications of heart disease
    429.7 Certain sequelae of myocardial infarction, not elsewhere classified
        429.71 Acquired cardiac septal defect
        429.79 Other
V45, Other postprocedural states
    V45.8, Other postprocedural status
        V45.81, Aortocoronary bypass status
        V45.82 Percutaneous transluminal coronary angioplasty status
CHD equivalent
    Diabetes249.xx, Secondary diabetes mellitus
250.xx, Diabetes mellitus
648, Other current conditions in the mother classifiable elsewhere, but complicating pregnancy, childbirth, or the puerperium
    648.0 Diabetes mellitus
    Peripheral arterial disease440.xx, Atherosclerosis
443, Other peripheral vascular disease
    443.8, Other specified peripheral vascular diseases
        443.81, Peripheral angiopathy in diseases classified elsewhere
        443.9, Peripheral vascular disease, unspecified
444, Arterial embolism and thrombosis
    444.2, Of arteries of the extremities
        444.21, Upper extremity
        444.22, Lower extremity
445, Atheroembolism
    445.0, Of extremities
        445.01, Upper extremity
        445.02, Lower extremity
    Cerebral vascular disease433.xx, Occlusion and stenosis of precerebral arteries
434.xx, Occlusion of cerebral arteries
435.x, Transient cerebral ischemia
436, Acute, but ill-defined, cerebrovascular disease
437.x Other and ill-defined cerebrovascular disease
438.xx, Late effects of cerebrovascular disease
V12, Personal history of certain other diseases
    V12.5, Diseases of circulatory system
        V12.54, Transient ischemic attack and cerebral infarction without residual deficits
    Abdominal aortic aneurysm441, Aortic aneurysm and dissection
    441.0, Dissection of aorta
        441.02, Abdominal
        441.03, Thoracoabdominal
    441.3, Abdominal aneurysm, ruptured
    441.4, Abdominal aneurysm without mention of rupture
    441.5, Aortic aneurysm of unspecified site, ruptured
    441.6, Thoracoabdominal aneurysm, ruptured
    441.7, Thoracoabdominal aneurysm, without mention of rupture
    441.9, Aortic aneurysm of unspecified site without mention of rupture
Risk factors used in assessing risk category for primary prevention
    HDL cholesterol≥60 mg/dL (−1)
    AgeMen, ≥45 years; women ≥55 years (1)
    Cigarette smokingYes (1)
    HypertensionBP ≥140/90 mmHg (average of 2 most recent measurements) or taking antihypertensive medication (1)
    Low HDL cholesterol<40 mg/dL (1)
    High HDL cholesterol≥60 mg/dL (−1)
    Family history of premature CHDCHD in male first-degree relative <55 years old; CHD in female first-degree relative <65 years old (not consistently available in DARTNet) (1)