A thief stole an ambulance from a Brooklyn hospital and took it for a 6-mile joy ride Sunday, cops said.

Cops received a 911 call around 7 a.m. saying an unauthorized driver maneuvered the ambulance out of a bay at Brookdale Hospital and took off, police said.

The vehicle, an Interfaith Hospital Ambulance, was recovered about two miles away at East 103rd Street and Flatlands Avenue in Canarsie, police said.

There was no immediate arrest.