In order for one person to talk to another person about your confidential info, you have to give written consent. So even if you give some your primary's contact info, unless you sign consent, they can't even admit you're their client.

None of my Pdocs or Ts have had contact with my primary. All my Pdocs and other medical professionals (dentist, specialists) have wanted my primary's info in case of emergencies.

My current primary and Pdoc have dual doctorates, so they can both practice as a Pdoc and primary. And since they both work in the same clinic and my primary does actively practice both, they already have access to all my info with or w/o my consent. And I did give my Pdoc and T consent to talk to each other.