Police say they are becoming concerned for the safety of Stuart Cowin, a resident of Medihands Health Care in New Malden.
The 46-year-old was last seen in the New Malden area on Tuesday, 22nd January.
Mr Cowin is Asian, approximately six feet tall with black hair and a moustache.
He is believed to be wearing a yellow shirt, brown trousers, black coat and white rubber shoes.
Officers say he may be heading to Bradford, Yorkshire where he has family links.
Medihands Health Centre in Westbury Road is a small care home looking after adults and younger people with learning difficulties and mental health conditions.
If you have information ring Kingston police on 101 quoting reference 13MIS002490.