I use first names when referring to people in my life. They only get named if they come up repeatedly or their role in my life is... complicated.

I do not want my FOO contacted about me and they would not be hard to find for someone who knew my full name. I have a friend who holds a medical power of attorney for me (only valid if I can't speak for myself). I always list her as my emergency contact. She would tell me if someone spoke to her (and has), and I trust my providers to tell me before they contact her too (and they have). I have an explicit conversation about that with the provider if things are going that route.

I have a personal policy of honesty with my tdoc and pdoc, because if they don't know what's going on I'm wasting my money. Sometimes that's easier than others of course, but overall I don't have anything to hide. I'm not doing anything to endanger someone else. I'm quite open even with my SI thoughts. As an adult it's never backfired on me (it's different if you're a minor, the rules are different), if I focus on my overall goal is to feel better about myself and life.