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Vitamin C, Ascorbic Acid

Tube Type = Green Top

Tube Type

Test ID   LAB671
EPIC Order
   VITAMIN C
CPT Code(s)   82180
Group/Individual Test   Individual
Laboratory   Core Referral Testing
Tube Station   30
Specimen Routine: 4mL blood/dark green sodium heparin tube; protect from light; See Comments 
  Micro: 1.5mL blood
Availability Routine: Reference Laboratory - Mayo Clinic Laboratories
Turnaround Time   5-7 days
Reference Range Normal: See separate report
     
Comments
Patient should be fasting 12-14 hours. For infants, collect prior to feeding.
Place on wet ice immediately after collection. 
Draw a separate tube when collecting other vitamins. 
Sample must be processed within 4 hours of collection. 

Reviewed by J. Carr on December 18, 2025

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