E.B.
I admittedly do not know about bipolar disorder, but my daughter has at least 8 major medical/psychiatric diagnoses and is medically disabled. We go to multiple specialists, and I do a tremendous amount of research, insurance paperwork, and record keeping.
It sounds as though your son is going to need help with several issues. Here, in a nutshell, are the things that have saved my sanity.
1. Note-taking. I have a binder with a legal pad in it. I write questions that I think of for upcoming appointments. Example: dermatology appointment on the 8th. Remember to ask dermatologist about that new spot, or the itching, or a new cream we're trying. I also take notes during the appointment. Doctors frequently say things in the course of the appointment that I want to think about later when I have time, or research further. Or they might throw out an idea - "try taking that med an hour earlier", and I write that down so I can remember it all later.
2. Record keeping. I have a 20 pocket very sturdy portfolio (looks like a briefcase - got it at an office supply store). One pocket for each calendar year, with important results, blood tests, doctor's notes filed in chronological order. One pocket is for neuro-psych testing regardless of year. One pocket is for CDs of MRIs and CT scans.
3. Access to info. On the significant records (like the one where the bloodwork first definitively showed Lupus, for example), I put a red flag (one of those post-it flags). Then I keep a separate piece of paper in a separate pocket with the red flags' location and what they represent. Example: 2011, red flag showing positive Lupus markers. If a doctor asks when or where she was diagnosed with Lupus, I look at the red flag list and I can pull out exactly the blood work results I'm looking for. I also keep a timeline. It's amazing how, in the hubbub of an appointment, a doctor can say "when was that surgery?" and all of a sudden I can't recall - there's so much info swirling around in my brain. Look at the timeline. That surgery was in 2010. It saves a lot of time.
4. Only one pharmacy. We do not switch pharmacies, and develop a good relationship with the pharmacist. They are invaluable when it comes to medication questions (timing, dosage, what foods to avoid, side effects, etc).
This is how I get through multiple specialists, multiple tests, and complicated medical records. I hope your son gets the help he needs.