@merpreb I am not sure how the insurance companies benefit, but you are right about each hospital having different portals. There are some hospitals that are "partners" and are on the same hospital. I do like that on the portal here I can go back and see information and I can check on appointments scheduled.
These days all of the PCPs are actually employed by the hospitals, there are no private practices anymore. I see the day when there will patients will not even have a physician that they go to regularly. All of the information is on the portal so the patient will just go to a central location and see whichever doctor is available. I miss the days when doctors had their own practices. Now if you have to go to a hospital for care your physician does not see you at all, you see a series of doctors of whom you have never heard. Really, if you are sick do you want to see the physician you have developed a relationship or a stream of strangers?