Custom Slice Xpanded® Priority - Written Results in 3-4 Weeks

New York

Clinical Utility

  • Analysis limited to a pre-approved list of one or more genes submitted by provider
  • Determination of a clinical diagnosis
  • Identification of gene implicated in genetic disease
  • Recurrence risk assessment

Lab Method

  • Next-Gen Sequencing

Important Information

The Custom Slice Xpanded® Priority (trio preferred) is an exome sequencing test with analysis limited to client selected genes with a prioritized turnaround time (TAT) of approximately 3-4 weeks. Because of the rapid TAT, blood or DNA samples on the proband and both biological parents must be submitted at the same time, along with clinical information, in order to begin testing. This test requires pre-approval by GeneDx via provider submission of one or more genes. Please email [email protected] prior to sending in samples.

Insurance billing not accepted

Test Code


CPT Codes*

Varies by Genes

ABN Required


Turnaround Time**

3-4 weeks

Preferred Specimen

3-6 mL Blood Only - Lavender Top Tube

Alternative Specimen

Buccal Swabs

*The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

**Turnaround times are estimates and begin once the sample(s) begin processing at the GeneDx lab and could be extended in situations outside GeneDx’s control.