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Instructions for Downloading the Medicare ZIP Code File for April 2023 Files

The purpose of this Change Request (CR) is to describe the process for updating the two Medicare ZIP Code files (ZIP5 and ZIP9) for the April 2023 quarter. This instruction also describes the revision to and the process for downloading the Calendar Year-End ZIP Code files. The attached recurring update notification applies to chapter 15, section 20.1.5(B).

Download the Guidance Document


Issued by: Centers for Medicare & Medicaid Services (CMS)

Issue Date: December 21, 2022

DISCLAIMER: The contents of this database lack the force and effect of law, except as authorized by law (including Medicare Advantage Rate Announcements and Advance Notices) or as specifically incorporated into a contract. The Department may not cite, use, or rely on any guidance that is not posted on the guidance repository, except to establish historical facts.