John Z. Ayanian, MD, MPP

Among near-poor Black and Hispanic individuals, Medicare Advantage was associated with increased vision care and some, although not uniform, reductions in access disparities vs traditional Medicare.

Enrollees who join Medicare Advantage undergo significant turnover in the years following enrollment.

Medicare Advantage enrollees are more likely to be treated with metformin and sulfonylureas and less likely to receive costly newer medications than those in traditional Medicare.

In the era after Medicaid expansion, primary care providers placed importance on practice capacity, specialist availability, and reimbursement when deciding whether to accept new Medicaid patients.

Compared with traditional Medicare, relative resource use for those with diabetes or cardiovascular disease is lower in Medicare Advantage, while quality of care is higher.