Mine was a combination of my primary and psychiatrist. When I first started with a therapist and was in the hospital I was diagnosed with depression. The meds helped but I didn't truly start to get better until I started a mood stabilizer. I was in a major episode of depression but didn't know enough to know that I had hypomanic episodes in the past. It wasn't until I really opened up and started talking about my earliest memories of depression that we figured it out.