---
title: "AZ Medicare Part A"
slug: "az-medicare-part-a"
updated: 2026-04-07T17:20:30Z
published: 2026-04-07T17:20:30Z
canonical: "docs.claim.md/az-medicare-part-a"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.claim.md/llms.txt
> Use this file to discover all available pages before exploring further.

# AZ Medicare Part A

## Payer Specific Bill ID/Submitter ID

The AZ Medicare Part A payer ID is 03101.

This payer requires a payer assigned ID number. This value can be sent in block 33b, bill_id Loop 2010AA, REF02, REF01=G2. This submitter ID value will be acquired during enrollment or by contacting Noridian EDISS.

![](https://cdn.document360.io/367e6528-88da-4443-9da1-fcdd7e6d4d49/Images/Documentation/image-1737136099553.png)

## Understanding Arizona Medicare Part A Submitter ID Errors

If you encounter a claim rejected due to the **Submitter ID**, it may indicate that the Submitter ID used on the claim was invalid. For **Arizona** **Medicare Part A**, the Submitter ID must begin with **“AZ”** followed by **five or six digits** (for example, *AZ**123456*).

You may also receive an error message if the **Bill/Submitter ID field is left blank**. Ensure this field is completed using the correct Submitter ID format to avoid claim rejections.

Below is an example of a claim rejection caused by the field being left blank: ![](https://cdn.document360.io/367e6528-88da-4443-9da1-fcdd7e6d4d49/Images/Documentation/image-1763700010060.png)

You may also receive an error message if the **Bill/Submitter ID field is left blank**. Ensure this field is completed using the correct Submitter ID format to avoid claim rejections.