A rep for the former Laguna Beach and The Hills star confirmed reports that she'd received medical treatment after the incident in Chicago on Thursday, 21 January.
Her spokesperson told Us Weekly: "She was hit by another driver in Chicago. She is doing fine and will be discharged from the hospital shortly."
The car collision was first reported by TMZ, who said the star's kids weren't in the car.
Kristin and her NFL player husband Jay Cutler have sons Camden, two, and Jaxon, one, and newborn daughter Saylor.
Baby Saylor was born on Monday, 23 November.