Officers responded to multiple calls around 7:15 am (5:45 pm IST) about a disturbance coming from her West Hollywood apartment, reported People magazine.
Upon arriving at her residence, officers found the 31-year-old actress with a guest.
According to Sergeant Duncan of West Hollywood Sheriff's Department, Barton, who is best known for her role as Marissa Cooper on the hit show "The OC", was "fully clothed" and "speaking in coherent statements" before she willingly went to the hospital.
However, TMZ reported that she was transported for a mental evaluation.