Messages Overview

1 min

The Messages Overview section describes the electronic message transactions supported by the Electronic Prior Authorization (ePA) Companion Guide and outlines their role within the prior authorization workflow. It provides a high-level summary of each message type, including its purpose, trigger events, and general processing expectations, to help implementers understand how requests, responses, and status updates are exchanged between trading partners.

This section is intended to orient readers to the message ecosystem before reviewing detailed transaction specifications and implementation requirements in subsequent sections.

Refer to the following topics for more details:

Message Descriptions

Acknowledgment Messages

Electronic Prior Authorization Message Flow

Detailed Electronic Prior Authorization Message Scenarios

PANotification Message Scenarios

Validating PAInitiationRequest Data

PAIntiationRequests After Real-Time Prescription Benefit (Real-Time Benefits Inquiry)

Directories

Failure Mode/Response Approach