Attention: We no longer offer cytogenetic testing for all sample types and infectious study add-on testing for prenatal specimens. Please view the list of retired tests and FAQs here and contact us at with any questions.

GenomeXpress - Rapid Genome Sequencing with Verbal Results in 7 Days

New York

Clinical Utility

  • Determination of a clinical diagnosis
  • Identification of gene implicated in genetic disease
  • Recurrence risk assessment

Important Information

The GenomeXpress test is an expedited nuclear genome sequencing test with a turnaround time (TAT) of approximately 2 weeks performed concurrently with mitochondrial genome sequencing and deletion testing. A verbal result for rapid nuclear genome findings is given within 7 calendar days after the start of testing and will include pathogenic and/or likely pathogenic variants in known disease-causing genes definitively explaining the patient’s phenotype. A written report including all clinically relevant variants will be reported within approximately 2 weeks after the start of testing. Concurrent mitochondrial genome test results will be provided in a separate written report within approximately 3-4 weeks after the start of testing; mitochondrial variants are not included in the verbal result.

Because of the rapid TAT, blood 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 approval by GeneDx; please email to discuss prior to sending in samples.

Insurance billing not accepted

Test Code


CPT Codes*

81425x1, 81426x2

ABN Required


Turnaround Time**

Verbal result in 7 days and final written report ~2 weeks for nuclear genome sequencing test; 3-4 weeks for mitochondrial genome test written report

Preferred Specimen

2-5 mL Blood - Lavender Top Tube

Alternative Specimen

Please contact our Xpress Team at to discuss.

*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.

**Reporting times are typical and begin once the sample(s) are received at the GeneDx laboratory, but could be extended in situations outside GeneDx’s reasonable control.