Inept and incorrect medical history record keeping is a problem that makes me seethe with impotent rage.
Mid 2000s, I worked on an EMR with a "physician portal" front end and a "federated" backend sharing data across orgs and services.
I made our first "patient portal", think MyChart, which our sales team shopped around. Very little interest.
Have you ever had to correct simple stuff like your prescriptions? Over and over again? Because it seems your corrections never seem to take hold and propagate thru the system?
I can tell you exactly why. My team fixed the data models and queries for things like prescriptions, current and historical.
(Our portal even had a browser-based DICOM medical image viewer. Non-clinical grade, of course. But it worked and blew people's minds, at the time.)
Alas, M&As (both us and our clients), the 2008 economic crash, and supremacy of EPIC, Cerner, and the like swept away all our progress. Like it never happened.
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Any way. Today I just do what every one else here suggests: Keep the papers, scan the important stuff, and have an up to date summary in Notes.app. And then grind my teeth while reviewing (and correcting) my history with each new provider.