finding reliable medical practitioners

[Doctor and Mrs. Science]

Hello, just joined.  Looking for a therapist in the greater Philadelphia area (or telehealth) for our 16yo son, who has had anger and depression over the last 4 years or so and has so far been diagnosed with bipolar disorder, ADHD, DMDD.  Has had about 5 therapists so far.  About two years ago started questioning his gender identity, may have been influenced with material online.  No hint before that.

If you are reading this and know somebody, let us know, we'd appreciate it.  Thanks!