What is a DEX Z-Code?

A Z-Code is a unique identifier assigned through the DEX Diagnostics Exchange registry, used by the MolDx program to identify a specific molecular test for claims processing and coverage determination.

Can you guarantee a favorable MolDx coverage decision?

No. Coverage decisions are made by the MolDx program and payers. We help you prepare complete, well-organized evidence and responses; we do not promise approval or reimbursement outcomes.

Service 05

MolDx, DEX Z-Codes & Technical Assessment

The MolDx program evaluates molecular diagnostic tests through technical assessment and requires test registration in the DEX Diagnostics Exchange. We help laboratories organize evidence, map it to applicable coverage policy and respond to reviewer questions clearly and completely.

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Scope of support

What this engagement covers

MolDx technical assessment readiness
Coverage-policy mapping
Evidence gap analysis
Point-by-point response packages
Validation dossier review
DEX Z-Code support
Clinical utility evidence alignment

What you can expect

A submission organized around what reviewers need to evaluate
Evidence gaps identified before, not after, submission
Complete, traceable responses to reviewer questions

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