President-elect Donald Trump said Tuesday that he would appoint Dr. Mehmet Oz, the famous television host, would nominate to lead the Centers for Medicare & Medicaid Services.

CMS operates or oversees health care programs that provide coverage to approximately 1 in 2 Americans, including Medicare, Medicaid, the Children’s Health Insurance Program and the Obamacare marketplace Healthcare.gov.

These four programs account for $1.6 trillion in spending, or nearly 25% of the entire federal budget.

CMS is an agency within the Department of Health and Human Services.

Trump said last week he would nominate Robert F. Kennedy Jr., a vaccine skeptic and conspiracy theorist, as HHS secretary.

“Our broken health care system is harming everyday Americans and crushing our country’s budget,” Trump said in a statement announcing his intention to nominate Oz.

“Dr. Oz will be a leader in driving disease prevention so that we achieve the best outcomes in the world for every dollar we spend on health care in our great country,” Trump said. “He will also reduce waste and fraud within our nation’s most expensive government agency, which represents a third of our nation’s health care spending and a quarter of our entire national budget.”

Chiquita Brooks-LaSure is the current CMS administrator.

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