About this Guide

0.1 Legal Notices

0.2 Consensus Body and Document Control

0.3 Change Log

Use Case Overview

1.1 Direct Secure Messaging

1.2 The Need for a Standard

2.1 In Scope

2.2 Out of Scope for the Guide

3.1 Two Business Actor Use Case

3.2 Three (or more) Business Actor Use Case

2.3 Scenarios

2.4 Roles and Actors

Transaction Framework

4.1 Message Format and Payload

4.2 Context/Metadata Requirements

4.3 Content Requirements

4.4 Human Readable Content

Endpoint Capability Statement

Implementation Guidance

Terms

Appendices

References

Vocabulary

5.2 Additional Optional Content Payloads

5.3 Requirement Description from CMS Rule

5.4 Data Elements in the Message Payload

5.5 PD1 – Patient Additional Demographic

5.6 Maternal Health Use Case

Version History

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ANSI/DS2020-03-101-2025 – Event Notifications via the Direct Standard®

Release Version 1.2

March 20, 2025

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