Police are searching for Matthew Sturgess, who is missing from Brighton.
The 38-year-old was last seen leaving Royal Sussex County Hospital about 3pm on Tuesday May 28 and officers say they are concerned due to his vulnerability.
Matthew, who is from Leicestershire, is described by police as white, about 5’10”, of medium build, with brown shaven hair.
He may be wearing grey tracksuit bottoms, a tracksuit jacket and a beanie hat.
Anyone who sees him is asked to report it online or call 101 – or 999 in an emergency – quoting serial 1444 of 28/05.