First of all, is the company actually stock trading?
secondly, will the stock actually go up on passing? It could go either way... if the company was doing well under him, likely downwards.
You might not be breaking any laws... but the doctor? If found out he told you something like that, and the company name... well he could loose his license, possibly his job, even a fine / jail time dependant on what confidentiallity agreements he has.