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Thyroid Stimulating Immunoglobin (TSI)

Tube Type

Test ID		LAB746
EPIC Order		THYROID STIMULATING IMMUNOGLOBULIN
CPT Code(s)		84445
Group/Individual Test		Individual
Laboratory		Core Referral Testing
Tube Station		30
Specimen	Routine:	1.5 mL blood/red plain tube/gold SST also acceptable
	Micro:	1 mL blood
Availability	Routine:	Reference Laboratory - Mayo Clinic Laboratories
Turnaround Time		4-8 days
Reference Range	Normal:	See separate report

Reviewed by J. Carr on December 11, 2025

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