Medical practitioners and hospitals are on a "Health Practitioner's Network" up here, so patients don't have access to the specific patient info. The storage of data is on a "Cloud"...which is a misnomer for a huge data base somewhere.

I think that the "View my chart on line" is a separate service, specifically for patients.

Either way, it seems that a lot of our personal info is "out there". For example, when you go to a retailer and they ask for your postal code, if you provide that and use your credit card or a reward card, a hacker can figure out that you are the Jane Doe from Chicago rather than the Jane doe from Seattle.
From there, they can get your address by using the phone book and that is all they may need to track your purchases, your activities, hack into your wireless, steal your mail, obtain your banking info and/or use that info to obtain credit in your name or steal your identity.

Personally, I don't use reward cards, usually pay by cash or by Pay-pal (from a separate account at a bank that is different from my main one), or by credit card with a low credit limit when purchasing on-line. I also don't participate in social media like Facebook, Twitter and the like.

Super paranoid? Yup .
I think that it is very important to guard all of your personal info.

With love, Erika