Which regulatory body oversees Medicare and Medicaid regulations?

The Centers for Medicare and Medicaid Services (CMS) is the regulatory body that specifically oversees Medicare and Medicaid programs. CMS is responsible for administering these federal health programs, ensuring compliance with regulations, and overseeing various aspects including policy formulation, program implementation, and the management of the services provided under these programs.

While the Department of Health and Human Services (HHS) encompasses CMS and is responsible for public health-related issues more broadly, it does not specifically manage the regulations for Medicare and Medicaid. Therefore, while HHS plays a pivotal role in public health, it is CMS that directly oversees the regulations and policies related to Medicare and Medicaid.

The National Institute of Health (NIH) focuses primarily on biomedical and public health research and does not have regulatory authority over Medicare or Medicaid. Similarly, the Food and Drug Administration (FDA) oversees the safety and efficacy of drugs, food supplies, and medical devices, rather than managing health insurance programs. Thus, the central focus of Medicare and Medicaid oversight rests with CMS, making it the correct answer.