Welcome to DEX™ Diagnostics Exchange

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.


Important Update

Facility & Professional Lab Services:

As of Oct. 1, 2021, all UnitedHealthcare Medicare Advantage claims in a MolDX jurisdiction require the DEX Z-Code™ identifier associated with the Molecular Diagnostic Test Service provided. Learn More


See DEX Application Maintenance Schedule below:

Every Thursday from 8:00 pm - 10:00 pm Eastern Time.

The site will be available immediately after maintenance completes.