TBG (Thyroxine Binding Globulin)

Tube Type = Red Top

Tube Type

Test ID   LAB128
EPIC Order   THYROXINE BINDING GLOBULIN
CPT Code(s)   84442
Group/Individual Test   Individual
Laboratory   Core Referral Testing
Tube Station   30
Specimen Routine: 1.5 mL blood/red plain tube/gold SST tube also acceptable
  Micro: 1.4 mL blood
Availability Routine: Reference Laboratory - Mayo Clinic Laboratories
Turnaround Time 3-5 days
Reference Range Normal: See separate report

Reviewed by J. Carr on December 15, 2025

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