Surgikill (1989)

At Goode Community Hospital, Dr. Grace Goode tries to keep her bumbling and incompetent staff at the low-income establishment in line during a hectic day of typical rounds and influx of patients arriving for treatment. Things get more complicated when a killer, disguised as a doctor with a mask and scrubs, begins killing staff and patients in a series of horrific and hilarious ways. It's up to Dr. Goode to learn the killer's identity while trying to keep her hospital from being shut down for good.