The 32-year-old record producer was forced to cancel a gig in Las Vegas following the auto crash, and was rushed to hospital last night.
Harris, who is now dating Taylor Swift, reportedly suffered a laceration on his face and was taken to a nearby hospital by ambulance.
The star was taken by ambulance to an LA hospital and treated for a "laceration on his face. However, the DJ supposedly bolted "against medical advice" soon after arriving because the hospital didn't have any private rooms available, TMZ reported.
Harris' management confirmed he had been in a vehicle accident in a statement posted to his Facebook page early Saturday.
"Adam's transport was involved in a collision this evening on the way to the airport".
"He has been examined by doctors and told to rest for a few days", read the statement on Facebook.
According to the cops, at around 11pm P.S.T. on Friday night in Los Angeles, a VW Bug convertible driven by a 16-year-old girl crossed the center line and crashed into the Cadillac SUV where Calvin was the passenger.
One of her teenage passengers was "ejected" from the vehicle, the website said.
"Wishing you a SWIFT recovery", punmaster Andrew Blank wrote in a Facebook comment.