I would be okay with it in VERY RARE situations -- like cancelling an appointment (I suppose that's scheduling, though) or maybe if I were to be hospitalized for mental health issues, if she called to check in on me. But even that situation is iffy to me.
I have to get in a certain mindset for therapy sessions. To be contacted by my therapist outside of those sessions unexpectedly would unsettle me, and I would definitely feel like s/he was intruding on my personal life.