Here is the list of departments that fall under Health and Human Services (HHS).
HHS Agencies & Offices
HHS has 13 operating divisions, including 10 agencies in the U.S. Public Health Service and three human services agencies. These divisions administer a wide variety of health and human services and conduct life-saving research for the nation, protecting and serving all Americans.
The Office of the Secretary (OS), HHS’s chief policy officer and general manager, administers and oversees the organization, its programs, and its activities. The Deputy Secretary and a number of Assistant Secretaries and Offices support OS.
https://www.hhs.gov/about/agencies/hhs-agencies-and-offices/index.html