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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 San Juan Capistrano

Epic ID


Lab Test Days


Standard TAT

4 Days

Collection Information

Specimen Required

2-4 mL Blood

Container Type

Red Top (No Additive)

Collection Instructions

Plasma collected in: Sodium heparin (green-top) or lithium heparin (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

Test Volume Required

1.8 mL Serum or Plasma

Minimum Test Volume

0.9 mL Serum or Plasma

Processing Instructions

Indicate serum or plasma in flag comment, on specimen and on batch sheet. Red-top tube (no gel): Allow blood to clot at room temperature. Centrifuge to separate the serum from the cells and immediately pour serum into a plastic transport tube. Serum separator tube (SST): Allow blood to clot at room temperature, centrifuge, and remove serum from the gel immediately (not to exceed 48 hours) by pouring serum into a plastic transport tube.

Included Tests

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

CPT Codes

84402, 84403