Welcome to DEX® Diagnostics Exchange Registry

The DEX® Diagnostics Exchange is a molecular diagnostic (MDx) test identification and policy management solution that connects payers and labs to bring clarity to MDx testing. MDx tests are uniquely identified and cataloged using DEX Z-Code® Identifiers – Palmetto GBA’s unique and proprietary 5-character alpha-numeric codes assigned within the DEX Diagnostics Exchange. The test registry catalog is available for reference and review by other stakeholders in the healthcare system.

Visit the website DEX® Diagnostics Exchange to learn more about the DEX Z-Code program.

Helpful topics:

  • DEX® Program overview
  • Frequently Asked Questions
  • Technical Assessment Forms

Register Your Organization

Submit your in-house tests for DEX Z-Code® assignment and/or see your reference lab's Z-Codes.

Register as a Lab or Hospital
Register as a Manufacturer

Register as a Public User

Browse the catalog for registered labs and their tests. DEX Z-Code identifiers are not visible to the Public User.

Register as a Public User

Already Registered?

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Password is required.
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DEX Z-Code® Identifiers, and all other software and content, © 2025 Palmetto GBA, LLC and/or one of its subsidiaries and affiliates. All Rights Reserved.
CPT © 2024 American Medical Association. All rights reserved. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein. CPT is a registered trademark of the American Medical Association.
U.S. Government Rights This product includes CPT and/or CPT® Changes which are commercial technical data, which was developed exclusively at private expense by the American Medical Association, 330 North Wabash Avenue, Chicago, Illinois 60611. The American Medical Association does not agree to license CPT to the Federal Government based on the license in FAR 52.227-14 (Data Rights - General) and DFARS 252.227-7015 (Technical Data - Commercial Items) or any other license provision. The American Medical Association reserves all rights to approve any license with any Federal agency.
Applicable FARS/DFARS Restrictions Apply to Government Use.

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