San Rafael resident Robert Leslie Davis was last seen having dinner with his daughter on Feb. 26 at Joe's Restaurant in Corte Madera, San Rafael police spokeswoman Margo Rohrbacher said.
He left around 8 p.m. that day driving in a 2001 silver Toyota Camry with California license plate 4SEY056, Rohrbacher said.
Davis has no cellphone or credit cards on him, she said.
He suffers from a medical condition and might become disoriented, according to Rohrbacher.
Police ended their search earlier this month after sending out fixed-wing aircraft and helicopters searching for Lewis, Rohrbacher said.
He is described as a white man with gray hair and gray eyes standing 5 feet 7 inches tall and weighing about 135 pounds.
Davis was last seen wearing a beige jacket, yellow sweater and beige slacks.
Anyone who has seen him is asked to call San Rafael police at (415) 485-3000.