Officers were dispatched to the hospital in the 1000 block of Sterigere Street around 7:30 a.m. for reports of a shooting.
When they arrived, police found a 25-year-old man suffering from a gunshot wound.
He was taken to Jefferson Einstein Montgomery Hospital in East Norriton, where he is reportedly still being treated
Pennsylvania State Police is investigating.
Norristown State Hospital is a long-term psychiatric facility, according to the State of Pennsylvania.
The hospital provides treatment for patients with severe and persistent mental illness.
There is no known motive and this isolated incident presents no danger to the public.
If you are experiencing suicidal, substance use or other mental health crises please call or text the new three-digit code at 988. You will reach a trained crisis counselor for free, 24 hours a day, seven days a week. You can also go to 988lifeline.org.