At one time, Mark Geier held licenses in 12 different states. Not any more. Until recently he had a license in Hawaii, but no longer. Per Todd W at Harpocrates Speaks: Mark Geier: Not a Leg to Stand On . Mark Geier, who promoted the idea that shutting down sex-hormone production in autistic children, adolescents and young adults was an autism cure, is no longer licensed to practice medicine in the U.S..