Hi,
I'm signing up for the basic insurance, and am wondering whether a supplementary insurance would be useful for something?

I'm in my early thirties, already have accident insurance and travel insurance.
My projected visits would be:
1. Dermatologist check ups twice a year (should be included in basic, as I have a first degree family member who had melanoma)
2. I want to try to get a Adderall/Ritalin prescription
3. STD check ups once a year

Would supplemental insurance be useful for any of that? From what I see, it's mostly good for glasses, new-age medicine, massages and such.