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Testosterone, Total

Tube Type = Gold Top

Tube Type

Test ID   LAB124
EPIC Order
   TESTOSTERONE
CPT Code(s)   84403
Group/Individual Test   Individual
Laboratory   Core Laboratory
Tube Station   30
Specimen Routine: 4 mL blood/gold SST tube/red plain tube also acceptable
  Micro: 0.9 mL blood/gold or red top bullet
Stability
Unspun: 24 hours
Spun/separated, Room Temp: 48 hours
Spun/separated, Refrigerator: 7 days
Spun/separated, Frozen: 6 months
Availability 24 hrs/day
Turnaround Time Routine: 2 hrs
Stat: 90 mins
Reference Range Normal: see table below
Reference Ranges:  Testosterone ng/dL (effective 7/13/2021)
Patient Age Female  Male
0-2 years <34 <263
2-10 years <12 <11
11-12 years <28 <479
12-13 years <28 <488
13-14 years <28 8-550
14-15 years <28 9-535
15-16 years <28 66-757
16-21 years 12-43 228-710
22-50 years 8-35 197-670
+50 years <36 188-684
 
  • Testing is performed using Siemens Atellica TST II Assay.  Different test methods should not be used interchangeably.  Heterophilic antibodies may cause interference.  High doses of biotin may cause test interference.
  • Cross reactivity can occur with Nandrolone decanoate, 11 beta-hydroxytestosterone and 11-ketotestosterone.  Steroid based medications could potentially cause falsely elevated values.

Reviewed by J. Carr on January 02, 2026

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