I have been diagnosed Bipolar in the USA for 20 years. No one said anything to ME about reporting to the Motor Vehicle Department. MOREOVER I am a Master's level Psychotherapist who did my post grad at Harvard. NOwhere have I heard of such a thing being compulsory unless you have seizures from meds or hallucinations that interfere with your driving! I think that Dr. was being abusive and trying to SCARE you into taking the meds. Whether you need them or not is a whole different issue, but his behavior was very arrogant and unacceptable. I'm very sorry this has happened to you!
Be Well;
Savage1