@Appleblossom
Wow Apple - that sounds really weird.
Personally - I would have refused to answer his questions - though he might have seemed harmless enough - and you might have given him some health info - but not personal info - which is important.
It's sounds like the doctor was doing some patient shopping - weird - I never thought about that before but it must happen. They can't advertise of course - but canvas - maybe.
I hope you are okay - I guess he sounded nice and doctory - mmm -
Anyway - I get these questionnaires on my phone - I tick the "prefer not to answer" box. Sometimes I just turn my phone off - these phone issues are endless - and a nuisance - are they not?
All the best - my sister on the other side of the Bay
Owlunar