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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.

Published on November 09, 2017

Spinal Muscular Atrophy (SMA) DNA Assay

Tube Type

Test ID		LAB11165A
EPIC ORDER		SPINAL MUSCULAR ATROPHY (SMN 1/2) DNA ASSAY
CPT Code(s)		81329, G0452
Group/Individual Test		Individual
Laboratory		Molecular Genetics
Tube Station		30
Specimen	Routine:	3 mL Lavender EDTA or Yellow ACD-A tube
	Micro:	2.0 mL blood
Availability	Routine:	Yes
Turnaround Time		10 days
Reference Range	Normal:	2 Copies of SMN1
Comments	For DIAGNOSTIC and CARRIER screening. Additional information: SMN 1 & 2 Information

Reviewed by J. Carr on November 20, 2025

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