Mubasher Ali, 36, of West Bowling, was last seen shortly before midnight last night at Bradford Royal Infirmary (BRI).
Bradford police are asking for information on the whereabouts of the missing Mubasher Ali.
He is described as an Asian male and is 6 feet tall, of medium build, and has short black hair.
He is believed to be wearing a white T-shirt, light blue jeans, white sneakers, a slim sweater and a short parka jacket.
Anyone with information that could help the police, or who see Mubasher or know his whereabouts, should contact officers.
If you can help, please contact the police at 101 or using the contact options on the West Yorkshire Police website.
You must cite the registration number: 2295 of 17 June.