Directory Services

DirectTrust compiles published Direct addresses into a single Aggregated Directory

Directory Aggregation Service

With a variety of HISPs operating, serving healthcare organizations, and issuing addresses, it’s important to have a single source of truth for address lookup. DirectTrust collects all published Direct addresses into a Directory, and then offers the DirectTrust Aggregated Directory back to participating HISPs.

Direct Secure Messaging

Secure and trusted health information exchange is fueled by the Direct Standard® and our robust national network

Participating HISPs submit their published Direct addresses to DirectTrust to be aggregated into a single directory, which is then distributed back to the HISPs. Those HISPs determine how their clients/users access the DirectTrust Aggregated Directory. DirectTrust highly encourages users to publish their Direct addresses for inclusion in the aggregated Directory for ease of look up by other users. The below map illustrates the distribution of Direct addresses across the United States.

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Read the Latest Directory Updates

See the most recent blog updates about our Directory, including the Directory Improvement Initiative!

Directory Improvement Initiative

The DirectTrust Directory Improvement Program represents a long-term commitment to continuous improvement, validation, and verification of the quality of information maintained in its Directory. This is not a “couple-day fix”; rather, it’s a long-term and ongoing commitment to creating and maintaining a high-quality national Directory asset that helps to expand the use of Direct Secure Messaging and makes it a more valuable data transport option within the national healthcare ecosystem.

How to Access the DirectTrust Directory

Our agreement with our network operator HISPs only allows directory data to be shared with the clients/users of other participating member HISPs. Nearly every healthcare organization or practice in the United States is served by a member HISP, and therefore should have access to the DirectTrust directory through their HISP.

The aggregated directory currently contains about half of all DirectTrust addresses. Why? Our agreement with our HISPs allows for privacy: addresses are only published if an organization chooses to share their addresses with the directory as a whole. While there are reasons for not publishing a Direct address, we encourage users to opt in to sharing their addresses.

Directory Services Policy and User Guide

Learn about how to participate in the Directory service, submit Direct addresses, and receive the aggregated Directory back

Directory Aggregation Participants

The following is a list of DirectTrust member HISPs and their status in the Directory Data Aggregation Service.