EHR Networks

Zus participates in two of the major national EHR networks - CommonWell Health Alliance and Carequality. These non-profit organizations facilitate the exchange of clinical information amongst participating healthcare providers, often implemented by their EHR. Collectively, these networks represent 75,000+ provider sites, 270M+ patients, and are connected to major EHRs such as Epic, Cerner, eClinicalWorks, Allscripts, athenahealth, and many others. A treatment use case is required, as well as reciprocity.

Data is exchanged on these networks in a CDA format. Zus stores the raw CDA, and also translates the underlying CDA and NCPDP documents into a rich set of FHIR resources. The resource types generated today are:

The underlying CDA documents are available through the following resource types:

• Binary
• DocumentReference
• Provenance

These networks are not comprehensive, meaning the history for a patient should be treated as partial. Certain information may not be available, including items that the patient asked not be disclosed due to patient privacy concerns, information excluded from the documents shared via the network, or information documented in non-participating systems. Additionally, given that the network is decentralized in nature, various participants may have downtime or be unavailable at any given time. At those times, the patient information they possess may not be available.