Which federal agency administers all parts of the Medicare program except for public information and enrollment?

The Centers for Medicare and Medicaid Services (CMS) is the federal agency responsible for overseeing the Medicare program, including its various parts, such as Hospital Insurance (Part A), Medical Insurance (Part B), and the Medicare Advantage plans (Part C), along with prescription drug coverage (Part D). CMS is crucial in regulating, managing, and implementing the rules surrounding Medicare services, ensuring that beneficiaries receive the care and benefits they are entitled to under the program.

While public information and enrollment processes for Medicare are often associated with the Social Security Administration, this agency primarily handles the enrollment process for Medicare Part A and Part B, not the overall administration of Medicare. CMS takes the lead in program functions, quality of care oversight, policy development, and implementation of Medicare services.

The Department of Health and Human Services plays a broader role in health-related matters in the U.S., but it is CMS that specifically administers the Medicare program. The National Institutes of Health focuses primarily on medical research and is not involved in the administration of Medicare. Therefore, the answer accurately reflects the agency tasked with managing the comprehensive aspects of the Medicare program.