In a letter to hospital CEOs and presidents, Faulker wrote, "We are concerned that health care costs will rise, that care will suffer, and that patients and their family members will lose control of their confidential health information." She urged the recipients, all members of Epic's network, to sign a letter of opposition addressed to HHS Secretary Alex Azar. "Very little time is left," she wrote.

If passed, the new rules could require the healthcare industry to adopt standardized APIs, so that data can be shared and accessed securely via apps. That could allow more app developers to deliver useful services. For instance, US veterans can now view their health records through Apple's Health app. Tools like those might become more common.

But, it is reasonable to question whether patient data would be kept safe. In the first half of 2019, 32 million patient records were breached. The Wall Street Journal found several iOS apps were sharing sensitive data with Facebook, and one study found 29 of 36 mental health apps were sharing info with Facebook and Google. Many did so without disclosing the practice. Though, even without the proposed rules, companies would likely find other ways to obtain patient data, as Google did with its "Project Nightingale."

The HHS proposal is still in the works, and it's unclear if or when it might pass. "It is unfortunate to see this much effort placed at stalling the important, bipartisan progress we have made to open up health information -- at a minimum to consumers and institutions they trust," former White House Chief Technology Officer Aneesh Chopra told CNBC.