Chromosomal Microarray (MicroarrayDx)

New York
Approved

Conditions

  • Chromosomal Abnormalities
  • Uniparental Disomy

Clinical Utility

  • Confirmation of a clinical diagnosis
  • Differentiation between de novo and familial cases
  • Improved recurrence risk and prognosis

Lab Method

  • Whole Genome Chromosomal Microarray

Based on current published guidelines, exome or genome sequencing can now be considered as first-tier tests for patients with unexplained epilepsy, developmental delay, intellectual disabilities and/or congenital anomalies.

References:

  1. Genetics in Medicine (2021) 23:2029–2037; https://doi.org/10.1038/s41436-021-01242-6
  2. Smith, L., Malinowski, J., Ceulemans, S., Peck, K., Walton, N., Sheidley, B. R., & Lippa, N. (2023). Genetic testing and counseling for the unexplained epilepsies: An evidence-based practice guideline of the National Society of Genetic Counselors. Journal of Genetic Counseling, 32, 266– 280. https://doi.org/10.1002/jgc4.1646

Test Code

910

CPT Codes*

81229x1

ABN Required

No

Turnaround Time**

3 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.

**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.

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