Reduced Cost-sharing for Preventive Drugs Preferentially Benefits Low-income Patients With Diabetes in High Deductible Health Plans With Health Savings Accounts

Background: High deductible health plans linked to Health Savings Accounts (HSA-HDHPs) must include all care under the deductible except for select preventive services. Some employers and insurers have adopted Preventive Drug Lists (PDLs) that exempt specific classes of medications from deductibles. Objective: The objective of this study was to examine the association between shifts to PDL coverage and medication utilization among patients with...