Michael Cooney, in his column LAYER 8, raises a number of issues about security and privacy. He says the issues come from using the 'cloud' to store and access health information whether by individuals or their medical care providers. You can read it here.
But before you do, remember that you can have an efficient patient chart file with fasteners, dividers, and even a built in envelope if needed for little more than the cost of the envelope and postage stamp used to send the first statement. Take a look here.