The fullback watched from the stands last Saturday as his Republic of Ireland team-mate suffered in a freak accident involving West Brom striker, Salomon Rondon, a similar injury to the one that sidelined him for nine months.
Just as Coleman did in a World Cup qualifier against Wales last March, McCarthy broke both the tibia and fibula in his right leg and underwent surgery this week to pin the bones back together.
The midfielder took to Instagram today to post a quick message of thanks, saying: "Just a quick message to say that my operation went well. Thanks to all the staff involved! and a big thanks to all my family, friends and Olivia. Also cheers for all the messages, I appreciate it."
McCarthy now faces months of rehabilitation but his friend, who took his first steps back into a competitive match last night when he turned out for Everton's U23s against Portsmouth, is determined to be his inspiration.
“It is a big shock for him and a big shock for his family," Coleman said of McCarthy.
“It is probably going to give me the motivation to be as good as I can possibly be to show James that there is a way back from it.
“Every day I go out, every week I go out, I am going to play the best I can so that he sees there is a way back.
“That is my motivation now. I have seen him and he will be back there is no doubt about that.
“I will be there for him, if I can play as best as I can then he can see me on a Saturday on Match of the Day setting up goals, scoring goals, that is the perfect motivation for him.
"Nowadays all you have to do is look at the likes of Luke Shaw, Aaron Ramsey, Ross Barkley, myself.
“Obviously I need to get back playing week in, week out to show that I am back."