Why is my data freely and instantly available within a centralized "health system" to begin with? Why can't we implement a digital equivalent of clunky paper records? Everything E2EE. Local storage requiring in person human intervention to access. When a new provider wants my records from an old one there should be a cryptographic dance involving all three parties. Signed request, signed patient authorization, and then reencryption for the receiving party using the request key.

What the health system should impose is a standard for interoperability. Not an internal network that presents a juicy target.