Dr. Wexler (originally Dr. Siegel) is a recurring doctor on Seinfeld. He was played by Victor Raider-Wexler.
The doctor performed the surgery in "The Junior Mint".
He was also the doctor who broke the news of Susan's death in "The Invitations" and who diagnosed George's atrophied condition in "The Summer of George".
He also testified in "The Finale, Part 2" about George's reaction to the news of Susan's death, enraging Mr. and Mrs. Ross in court.