TESTOSTERONE, FREE (DIALYSIS) AND TOTAL LC/MS/MS

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This test was updated on 06/19/2026. Click here to view the changes.

Test Details

Mnemonic

TFTLC

Ordering Code

3723600

CPT-4 Code(s)

84402, 84403

Specimen Information

Collect

Red top

Specimen Preparation

Allow blood to clot at room temperature, centrifuge, remove serum from cells and send 1.8 mL serum in a screw capped plastic vial.

Alternate Specimen

Plasma: Sodium or lithium heparin
Serum separator tube (SST)

Minimum Volume

0.9 mL

Transport Temperature

Refrigerated

Rejection Criteria

Gross hemolysis, gross lipemia

Stability

Room temperature: 7 days
Refrigerated: 21 days
Frozen: 2 years

Methodology

Chromatography/Mass Spectrometry, Equilibrium Dialysis, Calculation
more

Reference Range

See report
more

Performing Laboratory

Quest
more

New York DOH Approval Status

Yes
more
Turnaround Time
4 - 6 days
Performed
Sunday - Saturday
Legacy Code TFTLC
Example Report
Download

Resources

Interface Map for TFTLC

Test Name Ordering Code Result Code Component Name LOINC Code AOE Prompt Units
Testosterone, Free (Dialysis) and Total .LC/MS/MS3723600
3723610Testosterone, Total2986-8No
3723620Testosterone, Free2991-8No

The CPT codes provided are for general informational purposes only and are based on an interpretation of AMA guidance. It is the sole responsibility of the billing party to determine CPT codes. Any questions regarding coding should be directed to the paying party.

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