Blichfield was ejected for the hit.
MacKinnon, 25, stayed down on the ice momentarily before team medical staff escorted him to the dressing room. He didn't return for the remaining 12 minutes of the game.
Colorado head coach Jared Bednar provided a partial update on MacKinnon postgame.
"He seems to be doing good. I think that we got lucky on it," Bednar said. "Hopefully he's feeling good and everything tomorrow, but as of right now he seems to be fine."
Colorado led 2-0 at the time of the hit and scored a goal on the ensuing five-minute power play, and went on to win 4-0. MacKinnon had one assist in 18:05 of ice time before exiting.