Matthew L. Maciejewski, PhD

Medicare prospective payment for dialysis modestly increased availability and use of home-based dialysis treatment but did not affect historic racial disparities in home dialysis.

Health reform increased Medicaid enrollment, but was not associated with Veterans Health Administration and private insurance enrollment among Massachusetts veterans.

Value-based insurance design copayment reductions sustained medication adherence 2 years into policy implementation and were most effective in patients with poor adherence before policy implementation.

Incorporating functional status in diagnosis-based risk adjustment measures may modestly improve overall expenditure prediction for beneficiaries with substantial disabilities, but not prescription cost prediction.

A copayment increase from $2 to $7 adversely affected veterans' adherence to statins, antihypertensives, and oral hypoglycemic agents.