Regardless of whether they had a warrant, the doctor[s] who performed the procedure should be stripped of their license[s] and prosecuted for fraud, and any nurses or techs involved should be terminated. There's no plausible line of reasoning by which the procedures he was subjected to were medically appropriate or necessary.

But this won't happen because "they were just doing their job" and the medical licensing boards have long since abdicated any pretense of a code of professional conduct. (Witness the doctors sullying their credentials to peddle snake oil supplements and diet aids on late night TV).