Do I have the right to give my consent at the dentist to have them share information with a family member over the phone or in person ?

Answer 1

They might ask you for a notarized letter granting that permission, but probably.

Answer 2

Of course, you can give your dentist permission to share your information with anyone you want.

Answer 3

I believe the dentist would want written consent. 

Answer 4

in the US, if you are adult, of course..you would have to sign a form, but the info can be shared in person or over the phone