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.

Custom Slice (2-150 Genes)

Customize Order

New York

Clinical Utility

  • For smaller custom gene lists of 2-150 genes
  • Identification of underlying molecular cause of clinical diagnosis
  • Recurrence risk assessment

Lab Method

  • Next-Gen Sequencing

Test Code


CPT Codes*

Varies by Genes

ABN Required


Turnaround Time**

8 weeks

Preferred Specimen

2-5 mL Blood - 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.

**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.