Dr. Irving Zitsofsky is the lead-doctor and propertier of Dr. Zitsofsky's Dermatology Clinic and appears briefly in Simpsons Roasting on an Open Fire. Marge takes Bart to him after Bart gets a tattoo at The Happy Sailor Tattoo Parlor. D. Zitsofsky charges a high fee, that Marge pays, and uses lasers to remove Bart's tattoo. In Coming to Homerica he is in the mob of people against the Ogdenvilians but is hard to see. His name is possibly an allusion to 'zits off.' He was also seen giving an injection to Sideshow Bob after Bob won an Emmy.
- Episode – "Simpsons Roasting on an Open Fire"
- Episode – "Black Widower"
- Episode – "Coming to Homerica"