Officials are searching for Juan Rodrigues, 91, who has dementia and was last seen at 3 p.m. Tuesday at St. Francis Hospital in Port Washington in Nassau County.
Rodrigues, who also has a heart condition, may be in need of medical attention. At the time of his disappearance, he was wearing a black shirt and black pants.
He is described as being 5 feet 6 inches tall, weighing 140 pounds and having black hair and blue eyes.
Anyone who spots him should contact the Nassau County Police Department 3rd Precinct at 516-573-7347 or 911.