I believe seeing a therapist is essential.

I would look for someone who can teach you the skills you will need to handle the ups and downs that having bipolar can throw at you. So, in terms of modality I am a big fan of Cognitive Behavioral Therapy (CBT). A good therapist will also educate you about your disease so having someone with experience dealing with chronic mental illness (bipolar disorder for example) is also a good idea.

Most important, you will want to find a therapist who you can feel comfortable talking with. It's hard to tell after just one session so you may spend some time having to shop around, trying each therapist a couple of sessions. If you like your pdoc, you could ask for a referral. I believe good providers recommend good providers - if you know what I mean.

I wish you well on your adventure in finding a therapist.