Why do you say it is the standard of care? Is it written down somewhere as a universal standard of care? By whose authority? Is it the law?

It is not a matter of hiding anything from my therapist. Did I say that I wanted to hide something from my therapist? Nope.

I have a problem with being compelled to sign a document allowing the new therapist (who I don't know at all) to obtain information (personal private information) from my other practitioners to use in an unknown way, and also convey personal private information (as filtered through the new therapist) to caregivers I already have a relationship with.

Therapists do not require information from psychiatrists the way that GPs do. GPs and psychiatrists share responsibility for medical care and need to be aware of the patient's physical health and prescriptions in a way that a therapist simply does not.

Her demand of me presumes, without knowing me, that I am not able to report the basic information from the psychiatrist that might be relevant to talk therapy. She doesn't need to know detail. Her demand that I allow her to talk to my psychiatrist is not conditional on my actual behavior and level of responsibility, rather she wants to obtain rights to certain information without knowing whether that is necessary.

I am a well functioning, responsible, mature person. I do not want to be managed by by my doctor/therapist higher ups as if I was not the major player in the care of my psychological well being. It is I who responsibly seeks medical care for my condition, and it is I who shows up in therapy of my own volition to work hard on myself in a completely non-medical modality. I don't see why I should necesarily be obligated to force these two together.

From the outset, her approach implies that I cannot be trusted to be forthcoming, responsible and tell the truth. This is a bad way to start therapy. If a therapist shows distrust for me from the outset, then I find it difficult to trust the therapist and therapy becomes unlikely.