McCarthy suffered an ankle injury from the touch-line challenge by the Blues defender in which referee's assistant Trevor Massey had to be carried off after being struck in the face by the tip of the corner flag.
A Football Association spokesman said: "The FA are to take no action against Liam Ridgewell because the referee saw the incident at the time and dealt with the situation at the time."
Latics boss Roberto Martinez was incensed by the challenge and felt that referee Anthony Taylor should have sent off the Blues' player.
However, Taylor opted to take no action and reports that the FA are to act retrospectively over the incident have been dismissed.
Source: PA
Source: PA