Fragile X Syndrome: DNA Analysis

Sample Type

Test ID		LAB738
EPIC Order		FRAGILE X DNA ASSAY
CPT Codes		81243, G0452
Group/Individual Test		Individual
Laboratory		Molecular Genetics Laboratory
Tube Station		30
Specimen	Routine:	6mL Blood/Yellow ACD-A tube or Lavender EDTA tube; See Comments
	Micro:	minimum 2.0 mL Blood (3x Lavender EDTA Top Pediatric Bullets), Buccal swabs are acceptable for Peds; but blood is preferable.
Availability	Routine:	Weekly, not weekends or holidays
Turnaround Time		14 days
Reference Range	Normal:	No evidence of Fragile X genotype
Comments	For DIAGNOSTIC and CARRIER Screening: Additional information: Molecular Test for Fragile X Intellectual Disability Syndrome Molecular Genetics Test Request form Directions for collecting and mailing specimens for Molecular Testing If needed, Fragile X Methylation status will be ordered as a reflex test. CPT code: 81244 If needed, Fragile X AGG Interruption Analysis will be ordered as a reflex test.

Reviewed by J. Carr on November 20, 2025

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514