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Lab Test Dictionary

Testosterone, Free (Dialysis) and Total, MS (36170)


Chromatography/Mass Spectrometry; Equilibrium Dialysis; Calculation (CALC)

Specimen Type

Serum or Plasma

Performing Lab

Quest Diagnostics Valencia

Epic ID


Lab Test Days


Standard TAT

4 Days

Collection Information

Specimen Required

1-2 mL Blood

Container Type

Red Top (No Additive)

Collection Instructions

Plasma collected in a heparinized (green-top) tube is also acceptable.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: 7 Days; Refrigerate: 21 Days; Frozen: 2 Years

Rejection Criteria

Gross hemolysis; Gross lipemia; Serum/Plasma separator tubes (SST/PST)

Test Volume Required

0.9 mL Serum or Plasma

Minimum Test Volume

0.38 mL Serum or Plasma

Included Tests

Total Testosterone and Free Testoserone (calculated)

CPT Codes

84402, 84403