Coyle has not given up hope of seeing him in a Bolton shirt before the end of the season and is hopeful he will see more improvement in the next fortnight.
He said: "Gary will meet with a top specialist in a couple of weeks and we will take it from there.
"I saw him yesterday and he is in a good place mentally at the moment. He has been assured the clot has dissolved and everything else that goes with that.
"It is always nice when you can see someone and have a chat with them face to face. My primary concern was that he was going to be okay because he is a top man.
"Gary has thought everything through and he knows he is going to be fine. Ultimately when he gets the green light, he will be energised and will be able to resume his career. There is no doubt he is going to have a wonderful career."
Meanwhile Bolton's league match against Blackburn at Ewood Park has been rearranged for Sunday at noon.
Wigan 5/4, Draw 9/4, Bolton 9/4