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FISH Follow-up

New York

Clinical Utility

  • Evaluation of a specific cytogenetic region(s) as a follow up to chromosomal microarray analysis performed by GeneDx

Lab Method

  • FISH

Test Code


CPT Codes*

88230x1, 88271x2, 88273x1, 88291x1

ABN Required


Turnaround Time**

3 weeks

Preferred Specimen

2-5 mL Blood - Green Top Tube

Alternative Specimen

10 mL Amniotic Fluid|10 mg CVS|1 T25 flask of cultured amniocytes|1 T25 flask of cultured chorionic villi

*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.