Did Medicare Part D reduce disparities?

Area of Science:

• Health Services Research
• Health Economics
• Health Disparities

Background:

• Medicare Part D aims to improve prescription drug access for beneficiaries.
• The program includes a coverage gap that can limit medication access.
• Disparities in healthcare access persist among different demographic groups.

Purpose of the Study:

• To evaluate if Medicare Part D reduced existing disparities in medication access.
• To investigate the impact of the Part D coverage gap on medication adherence among minority and low-income populations.

Main Methods:

• Secondary data analysis of Medicare beneficiaries (2002-2008).
• Examined Part D drug claims (2006-2008) for Hispanic, black, and white beneficiaries with diabetes.
• Used difference-in-difference analysis and regression models, controlling for demographics, comorbidities, and income.

Main Results:

• Hispanics reduced diabetes medication use at twice the rate of whites in the coverage gap.
• Black beneficiaries decreased medication use by 33% more than whites.
• Reductions in medication use correlated with drug prices; minorities were more likely to discontinue and resume therapy.

Conclusions:

• The Part D coverage gap significantly disrupts medication access for minority and low-income individuals.
• Premium subsidies alone are insufficient to protect vulnerable groups.
• Improvements in adherence may necessitate changes in healthcare delivery and patient education.