Ok now I wanted to know:
https://travel.state.gov/content/travel/en/us-visas/Supplements/Supplements_by_Post/ACK-Auckland.html
As soon as you receive your appointment date, you must schedule a medical exam in New Zealand. Click the “Medical Exam Instructions” button below for a list of designated doctor’s offices in New Zealand. Please schedule and attend a medical exam with one of these doctors before your interview.
It is however consulate specific, below the one regarding Germany:
https://travel.state.gov/content/travel/en/us-visas/Supplements/Supplements_by_Post/FRN-Frankfurt.html#medical_exam_instructions
ATTENTION: IV Consolidation applicants (from Croatia, Cyprus, Slovenia, Slovakia, and the Netherlands) should ideally complete their medical exam in their home country if a panel physician is present there. Additional medical exam info for IV Consolidation applicants, as well as a list of designated doctors’ offices, can be found