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Effective Jan. 5, 2026: Temporary Age-Based Visitor Restrictions at UNC Health for all inpatient and waiting areas throughout its inpatient hospitals.

Prader Willi-Angelman Syndrome DNA Analysis

Tube Type = Yellow Top or Lavender Top

Tube Type

Test ID		LAB5677
EPIC Order		PRADER WILLI AND ANGELMAN DNA ASSAY
CPT Codes		81331, G0452
Laboratory		Molecular Genetics Laboratory
Tube Station		30
Specimen	Routine:	6mL Blood/Yellow ACD-A Tube or Lavender EDTA tube; See Comments
	Micro:	2.0 mL Blood (3x Lavender EDTA Microtainers) Buccal swabs are acceptable for Peds; but blood is preferable.
Availability	Routine:	Testing performed weekly. No weekends or holidays.
Turnaround Time		14 days - results are generally reported the next day after testing
Reference Range		No evidence of Prader Willi or Angelman genotype
Comments	Please call Molecular Genetics 984-974-1825 with questions. Additional Information: Prader Willi and Angelman Syndrome PCR Tests Molecular Genetics Test Request Form Directions for Collecting and Mailing specimens for Molecular Testing

Reviewed by J. Carr on November 21, 2025

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