Social determinants predict whether Medicare beneficiaries are offered a Comprehensive Medication Review.

Background: Medication reviews through Medicare's Medication Therapy Management (MTM) program may improve patient outcomes and lower health system costs, but these effects could be limited by a program design that does not address social determinants of health.

Objective: To analyze the effects of social determinants of health on the odds of an eligible Medicare beneficiary not being offered Comprehensive Medication Review (CMR).

Methods: Using the full 100% sample of the 2016 Part D Medication Therapy Management Data File linked to Medicare Master Beneficiary Summary File, a retrospective, cross-sectional analysis was conducted to determine which social and demographic variables are most strongly associated with being eligible for a CMR but not being offered one. Descriptive statistics were generated using SAS studio 3.8.

Results: Variables associated with the highest odds of not receiving a CMR when eligible are residence in Louisiana OR 1.79 (95%CI 1.70-1.88), receiving the LIS OR 1.76 (1.73-1.79), dual eligibility for Medicare and Medicaid OR 1.25 (1.12-1.41), and Black race OR 1.19 (1.16-1.21).

Conclusions: Social determinants of health, most strongly geography and low-income status, predict being eligible for but not being offered CMR. Race continues to be a factor in disparate access to MTM services.