The incident was reported shortly after 8 a.m. at Children's Health of Orange County on La Veta Avenue, a spokesperson for the Orange Police Department said.
The vehicle had been parked inside a three-story parking structure, the spokesperson said. The SUV fell about one level and landed on the roof of an adjacent building at the hospital.
The driver, the vehicle's only occupant, was transported to a hospital with moderate injuries, police said. Which medical center the patient was taken to was unclear.
The cause of the incident is under investigation.