He is in Boston recovering from surgery due to injuries suffered when he was shot
He had a complication he had to have another surgery for. They sent him to Boston so a specialist could preform the surgery. Ste.fano went with him.
He was sent to Boston, as the others have said.
If you are wondering about the actor, he is not coming back.
It appears no one knows for sure if the character is coming back; some say yes, some say no.
Boston. He went to see a specialist after he was shot.
Where did Chad go after revealing he didn't have a brain tumor