An unnamed woman claims that she and Busfield went on a date last Wednesday (May 16) and began kissing while watching a movie. She said then that she became uncomfortable when the star groped her genitals and her breasts, leading her to call off the date.
Busfield's date filed a police report over the matter on Thursday (May 17), but the star has not been arrested as of yet.
LAPD sources told TMZ that law enforcement officers are requesting to speak with Busfield.
A representative for the actor has not commented on the accusations.
Busfield shot to fame as Elliot Weston on the baby boomer drama thirtysomething and later as political reporter Danny Concannon on The West Wing.
He has also appeared in Law & Order: SVU, Blue Blood and Ed.
Watch a clip of Timothy Busfield in The West Wing below: