In 1971, after having proposed the creation of a urological museum at the AUA headquarters, Didusch was honored at a testimonial dinner, the proceeds of which founded a new museum named after him—the William P. Didusch Museum of the American Urological Association.
Didusch lived and worked at the AUA headquarters in a building that had been previously owned by Dr. Young. On August 4, 1981, Didusch did not come downstairs early in the morning to the AUA offices. He had suffered a stroke and died three days later.
Not all that Didusch drew was published, and not all operations that he illustrated have survived, but his skillful depiction of anatomy and surgery is as vivid today as when the drawings were created on his easel.