The app now enables providers at Frankfort Regional Medical Center to view patient data stored in Expanse on their smartphones and tablets.
Oxford University Hospitals and Women's College Hospital are among the first healthcare institutions to make this feature available to their patients.
Final rules require access to health information, spur innovation and aim to end information blocking.
The search giant has secretly been accumulating the health data of millions of Americans from 21 different states, in partnership with Ascension.
Only about one in 10 discharged hospital patients with access to their electronic medical records go online to take a look.
Dubbed Data at the Point of Care (DPC), it aims to fill information gaps and offer a more complete picture of a patient's health and history.
Representatives from the big tech and health plans said they want to help consumers get access to their medical claims data via an app of their choosing.
With the 2019 code App Challenge, Cerner encourages innovators to build apps on its platforms that further transform health care.
Once ready, it will let American veterans receiving care through the Veterans Health Administration view their aggregated health records on their iPhone.
The tech giant would create a tool that allows vets to download health records directly to their iPhones and link them to other health apps.