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Prenatal Rapid Aneuploidy FISH

New York

Clinical Utility

  • For prenatal diagnostic samples
  • Fetal abnormalities detected by ultrasound, abnormal prenatal screening by ultrasound or maternal serum showing increased risk for aneuploidy of chromosomes 13, 18, 21, X, or Y, advanced maternal age, or family history of chromosome abnormality

Lab Method

  • FISH

Test Code


CPT Codes*

88271x5, 88275x1, 88291x1

ABN Required


Turnaround Time**

2-3 days

Preferred Specimen

10 mL Amniotic Fluid

Alternative Specimen

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.