I recently dealt with the declining health of my grandmother and the repeated visits to specialists and general practitioners for her care. The #1 thing I did for her that extended and enhanced the quality of her life (and probably extended it for a year of fairly good quality time) was hustle medical records from one doctor to the next. If she saw a gastroenterologist I would immediately take all the notes taken and test results received over to her other doctors. This simple act (an extra hour of my time on top of any Dr's visit) identified and resolved 3 chronic health issues that she'd had to "live with" for nearly a decade. All because I had her paperwork and noticed that the 5 doctors she had kept running the same tests independently over and over but not equating all the results.
Without a paper trail, I'd never have figured it out. And before this experience, I just assumed all the doctors somehow used their secret handshake to share information.