Phoenix police are looking for 76-year-old Louis Scolish, who was last seen Sunday night.
Scolish is described as a 5-foot-6, 165-pound white man with hazel eyes and gray hair.
Police said he suffers from medical conditions that could cause him to appear confused or disoriented.
He was last seen in the area of 1400 E. Bell Road in Phoenix.
Scolish may be driving a white 2012 Toyota Corolla with Arizona license plate BKC9199.