Testosterone, Free (Dialysis) and Total LC/MS/MS

Test Code
36170

CPT Codes
84402, 84403

Includes
Total Testosterone, Free Testosterone (calculated)

Preferred Specimen
0.9 mL serum collected in a red-top tube (no gel)

Minimum Volume
0.38 mL

Other Acceptable Specimens
Plasma collected in: Sodium or lithium (green-top) tube

Instructions


Collect blood in a no additive red-top vaccutainer. Allow blood to clot. Centrifuge and pipette serum into a plastic vial.  Do not send serum collected in a serum separator tube (SST).




Transport Container
Plastic screw-cap vial

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 7 days

Refrigerated: 7 days

Frozen: 2 years

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum Separator Tube (SST®) • Gross hemolysis • Gross lipemia

Methodology
Calculation (CALC) • Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS) • Tracer Equilibrium Dialysis

Reference Range
See Laboratory Report

Clinical Significance
Helpful in assessing testicular function in prepubescent hypogonadal males and in managing hirsutism, virilization in females.



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.