Enrique Maese, known as Rick, has been missing since Thursday.
The 69-year-old was last seen on a bus bench near Normandie Avenue and 108th Street in South Los Angeles.
Maese suffers from short term memory loss. His family is concerned about his wellbeing.
He was last seen wearing faded blue jeans, a gray T-shirt, white high top Reebok tennis shows with black stripes, a black windbreaker and a black baseball cap with Clippers written on it. Maese has a black beard and a distinguishing mole on his face.
Anyone with information on his whereabouts was urged to contact Los Angeles County Sheriff's Missing Persons Unit at (323) 890-5500.