Hunter Doherty “Patch” Adams (born May 28, 1945) is an American physician, comedian, social activist, clown, and author. He founded the Gesundheit! Institute in 1971. Each year he also organizes volunteers from around the world to travel to various countries where they dress as clowns to bring humor to orphans, patients, and other people.

Adams is currently based in Urbana, Illinois. In collaboration with the institute, he promotes an alternative health care model not funded by insurance policies.