---
title: PAInitiationResponse Reason Codes for PBM/Payers
slug: electronic-prior-auth/guide/painitiationresponse-reason-codes-for-pbmpayers
docTags: 
createdAt: 2026-06-18T16:13:46.112Z
---

It is recommended to use all reason codes available and not a subset of reason codes. See [Message Business Flow Response Summary](docId:3uOZC9EJujVitelt0nr9g) for more information.

:::hint{type="info"}
**Note: **The reason code "BY – Other" should only be used when the reason for the closed response is not covered under another reason code.
:::