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Background: Cholesterol management guidelines from the American College of Cardiology/American Heart Association (ACC/AHA-2013) recommend fixed statin dosing (dose depends on age ≤ or >75 years) compared to the earlier adult treatment panel III (ATPIII) guidelines which recommended specific low-density lipoprotein-cholesterol (LDL-C) targets. Clinical implications of this recommendation are not known. Methods: We retrospectively compared cholesterol levels and statin utilization across cohorts with coronary artery disease (CAD) (n = 9563), peripheral arterial disease (PAD) (n = 596) and CAD + PAD (n = 975) by applying both guidelines. The percentage of patients who achieved guideline-specific targets using 2013 ACC/AHA (use of moderate/high intensity statins) or ATPIII guidelines (LDL-C 100 mg/dl. Conclusions: Application of the ACC/AHA guidelines results in a higher percentage of patients considered to be ‘at goal’ when compared to the ATP III guidelines without changes in clinical practice. This is due to patients ≤75 years old on adequate statin doses but still have LDL-C levels >100 mg/dl, thereby raising concerns that physicians may not pursue alternate LDL reduction strategies since they are now considered at goal despite LDL-C >100 mg/dl. Lipid management of PAD patients remains sub-optimal as compared to CAD and CAD + PAD.