Testosterone, Total, MS

Message

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

TESTTL

CPT Codes
84403

Preferred Specimen

1 mL serum collected in a red-top tube (no gel)

Minimum Volume

0.5 mL

Other Acceptable Specimens

1 mL plasma collected in sodium or lithium heparin (green-top) tube

Instructions

Centrifuge red-top tube and pipette serum into a plastic pour off tube. Label pour off tube RED TOP SERUM.

Transport Temperature

Room temperature

Specimen Stability

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

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Gross lipemia • Serum Separator Tube (SST)

Methodology
Chromatography/Mass Spectrometry

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Daily; Report available: 4 days

Reference Range

Age	Males (ng/dL)	Females (ng/dL)
Cord Blood*	17-61	16-44
1-10 Days*	≤187	≤24
11-30 Days	Not established	Not established
1-2 Months*	72-344	≤17
3-4 Months*	≤201	≤12
5-6 Months*	≤59	≤13
7-11 Months*	≤16	≤11
1-5 Years	≤5	≤8
6-7 Years	≤25	≤20
8-10 Years	≤42	≤35
11 Years	≤260	≤40
12-13 Years	≤420	≤40
14-17 Years	≤1000	≤40
≥18 Years	250-1100	2-45

*Data from J Clin Invest 1974;53:819-828 and J Clin Endocrinol Metab 1973;36:1132-1142

Clinical Significance

Helpful in assessing testicular function in male and managing hirsutism, virilization in females.

Performing Laboratory

Quest Diagnostics Nichols Institute

14225 Newbrook Drive

Chantilly, VA 20153

Last Updated: March 5, 2024

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.