You have the great advantage of all of the information. That clear advantage will greatly benefit you. EDIT: by "all the information" I mean the sum total of

You have the great advantage of all of the information. That clear advantage will greatly benefit you. EDIT: by "all the information" I mean the sum total of all your health information. Even if you are at an HMO (e.g., Kaiser), not everything is written in your record and not every Dr. will read your entire record. Also, only you can order a 2nd opinion, based on the facts you know. A Dr. will never order a 2nd opinion. I have literally never heard of this, but if it does happen, it is exceedingly rare.