Two senior agency veterans focused on policy and operations are working with DOGE to review the agency overseeing Medicare and Medicaid, which provide health insurance for about 1 in 4 Americans, according to a U.S. Department of Health and Human Services spokesman.

Representatives of Elon Musk's Department of Government Efficiency have been working at the Centers for Medicare and Medicaid Services, where they have gotten access to key payment and contracting systems,