Hill, 38, was hurt when he collided with Cleveland rookie Manny Harris under the Suns' basket with 7:53 remaining in the first quarter. He fell to the floor and was down for a few minutes before being helped off the court. He then walked unaided to the locker room.
Before his injury, Hill had slipped twice in nearly the same area.
Hill played four minutes in Phoenix's 108-100 win over Cleveland, tallying two points and three rebounds before leaving the game.
Hill has started all 35 Suns games this season and is averaging 14.5 points, 4.8 rebounds and 2.5 assists.
Information from The Associated Press was used in this report.