Before scheduling any new first appointments, you have every right to call the office and ask if the therapist specializes in bipolar or is open to working with BP patients. This might save you some frustration, time, and money going to appointments with therapists who won't see you. Most office staff can not know personal psych details of clients. If you try and speak extensively about yourself, you will be cut off. It's not personal. It is pretty standard. They aren't mental health professionals.
However, they can answer if the therapist sees BP patients.

Good luck in your search.