How do I get false information taken out of my medical records.?

If you are in the United Kingdom you cannot remove information from your medical records. (This is obviously regarding your actual medical notes and history, not your contact details etc; those you DO of course have the right to have altered).

However, you have a right to have a note added to your records that states the correct facts and points out what is wrong.

In the US, probably lawyer up or something. Enough money buys you anything you want regardless of the law I'm sure. ;-)