I want to have fluer de lys adbominoplasty to remove excess skin. I receive orencia (abatacept) and mtx, what about stopping for awhile before surgery.?

For sure. Any immune modulating medications may interfere with wound healing and increase risk of infections. Moreover, a fleur de lis abdominoplasty is a significant procedure and a very careful and accurate preparation is mandatory to limit postoperative complications. Discuss all meds with your surgeons.