Interoperability Engine
With powerful integration tools, EMR developers can rapidly enable their products with Direct messaging, IHE query, and HL7® FHIR® for ONC certification, CMS requirements, Promoting Interoperability, and MACRA/MIPS programs.
phiMail® Direct Messaging is designed for the secure exchange of protected health information over the Internet and includes built-in support for Context and Event Notifications via Direct. Our Direct service can be accessed through the standalone phiMail Web product that includes a with 1-click XDM Zip Viewer, or via XDR, SMTP, or the integration-friendly phiMail API (phiMail Integrated).
The phiQuery™ component of Interoperability Engine
enables HL7® FHIR®,
IHE query and OAuth APIs. Deployment options include an integration API to easily enable FHIR,
or OAuth as a Service on its own for those who bring their own FHIR server or want to leverage our UDAP capabilities and App Studio API management platform.
Works with SMART, UDAP, and the Argonaut Data Query Implementation Guide;
USCDI v3 and SMART v2 are supported to fully meet 2026 requirements.
phiQuery is ready for partners to use in ONC certification testing and many EMR Direct customers have already successfully certified. Our integration model allows data to remain on the implementer's system and is returned to authorized requesters in real time on a request by request basis. Interop Engine 2026 was designed to meet g.7, g.9. and g.10 standardized API for patient and population services requirements and includes FHIR R4 services, bulk data access and extensive FHIR implementer and app developer support.
Register for a complimentary developer account
including a test FHIR endpoint and Direct address, certification testing documentation, and unlimited email-based technical support.
Third party client app developers, visit
HealthToGo App Studio
for public FHIR documentation, registration information and other resources.
phiMail Web
phiMail Web users experience secure, remote access to phiMail messaging from their PCs, smartphones, tablets, and other devices using a web browser. Integration with your software is not required. XDM viewer included. Get phiMail Web
HISP Services
EMR Direct's phiMail HISP Services are fully DirectTrust accredited. Our HISP services are integrated into over 150 EHR systems, including Epic and MEDITECH.
Our HISP software is also ONC HIT
certified for Direct Transport under the ONC Certification Criteria for Health IT.
Create a Direct Messaging Account
CA and RA Services
We issue digital certificates to
qualified organizations and individuals through our phiCert™ Certification Authority,
for use with our HISP and FHIR services, in collaboration with another HISP, Carequality, or eHealth Exchange, or for Unified Data Access Profiles (UDAP) communities such as TEFCA Facilitated FHIR. Our Registration Authority's identity verification services include in person and remote LoA-3 and IAL2 options.
Our CA and RA services are also fully accredited by DirectTrust.
Create a phiCert Developer Account
phiMail Directory
Direct address lookup is available for our HISP customers to find providers on our network of more than 2.8 million Direct addresses.
HealthToGo® Services
HealthToGo healthcare information services include a FHIR client application, APIs and other resources available to third party consumers of Interoperability Engine FHIR and/or OpenID and OAuth services operated by customers of EMR Direct. Data from healthcare providers or other compatible data sources can be accessed by authorized users of HealthToGo or of third party applications developed for HealthToGo APIs. Documentation, an App Gallery and other developer resources are available at HealthToGo App Studio.
Learn More
To find out more about EMR Direct's products & services,
see the EMR Direct brochure,
and our white papers on
scaling health information exchange with Unified Data Access Profiles
and
consumer mediated exchange.
Frequently Asked Questions (FAQ)
Direct Messaging Overview
Trust Anchors
About X.509 Digital Certificates
Certified Partners
