How can I get a complete record of my or a parents medical records
Getting medical records
It should be fairly easy to obtain your personal medical records. If you have transfered your records each time you've changed doctors or gone to various specialists, you can request your records from them individually. They may have a form you will need to fill out. When I've requested my records, I've had to give written notice. There may also be a fee associated with the copying of the records (I've also had this experience).
Your parent's medical records may be a different story. Maybe someone with more knowledge can chime in.
You will have to do research to find out where they might have gone to the doctor. Sometimes research in a local library can help you learn which doctors were practicing at certain times in time.
I knew my dad used the Veteran's Administration, and also his private doctors' names. I have not tried to contact them. Maybe the VA could be a resource for you?