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Due to winter weather, some UNC Health facilities are closed or have altered operating hours. View clinic delays and closures.

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

Plavix Response Genotyping (Clopidogrel) (CYP2C19)

Tube Type

Test ID		LAB5657
EPIC Order		CYP2C19 GENOTYPING
CPT Codes		81225, G0452
Group/Individual Test		Individual
Laboratory		Molecular Genetics Laboratory
Tube Station		30
Specimen	Routine:	Preferred: 3 mL blood Lavender EDTA/3 mL blood Yellow ACD-A also acceptable; See Comments
Availability	Routine:	Performed Monday, Wednesday and Friday
Turnaround Time		If blood is received by 9:00 am then results are available 5:00 pm the same day. If blood is collected after 9:00 am Friday afternoon and on weekends, results will be available 5:00 pm Monday.

Comments	Additional information: CYP2C19 Sequence Variants Associated with Resistance to Clopidogrel (Plavix) Molecular test request form Directions for collecting and mailing of specimens

Reviewed by J. Carr on November 21, 2025

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