CTL Function

Tube Type x 2 = Green Top

Tube Type x2

Test ID LAB5615
EPIC ORDER CTL FUNCTION
CPT Code(s) 86352
Group/Individual Test Individual
Laboratory Core Referral Testing
Tube Station 30
Specimen Routine: 10 mL blood/dark green sodium heparin tube; See comments
Micro: 5 mL blood
Availability Routine: Reference Laboratory - Cincinnati Children's Hospital Medical Center
Turnaround Time 3 weeks
Reference Range Normal: See separate report
Comment
  • Samples must be kept at Room Temperature. Specimen must be collected Monday-Thursday between 10:00 am and 2:00 pm and received in lab by 3:00 pm.
  • Required specimen volume is dependent on total white blood count and absolute lymphocyte count. If these are low, a greater sample volume may be required.

Reviewed by J. Carr on December 03, 2025

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