Protecting Medicare Beneficiaries Act of 2015

This bill amends title XVIII (Medicare) of the Social Security Act to: (1) prevent 2016 increases to Medicare Part B premiums and deductibles for enrollees, and (2) authorize federal funding to offset the corresponding reduction in aggregate monthly premiums.

Under current law, the Centers for Medicare & Medicaid Services must annually determine the monthly actuarial rate upon which Part B premiums and deductibles are based. The bill temporarily freezes that rate at the 2015 level for enrollees, effectively preventing increases to premiums and deductibles for those enrollees in 2016. (Current law already protects Part B enrollees whose benefits are deducted from their Social Security benefits from premium increases that would result in a smaller Social Security check.)