DHHS: Acronym for the U.S. Department of Health and Human Services. Also known as HHS. The U.S. Department of Health and Human Services has two types of operating divisions: the Human Services and the Public Health Service Operating Divisions. The Public Health Service Operating Divisions include the: National Institutes of Health -- NIH is the wor... Found on http://www.medterms.com/script/main/art.asp?articlekey=10709