Ordering Recommendation

Most sensitive test for detection of hyperandrogenemia in women and children. Acceptable test for androgen deficiency in men.

Mnemonic
TESTOS FR
Methodology

Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry/Electrochemiluminescent Immunoassay
Total Testosterone and SHBG are measured and free testosterone is estimated from these measurements.

Performed

Sun-Sat

Reported

1-4 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation

Collect between 6-10 a.m.

Collect

Serum separator tube or green (sodium or lithium heparin).

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.8 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

EDTA plasma.

Remarks

This test is suggested for women and children due to an improved sensitivity of testosterone by LC-MS/MS.

Stability

After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 6 months

Reference Interval
Female Free Testosterone, pg/mL
Male Free Testosterone, pg/mL
1-6 years: Less than 0.6 pg/mL
7-9 years: 0.6-1.8 pg/mL
10-11 years: 0.1-3.5 pg/mL
12-13 years: 0.9-6.8 pg/mL
14-15 years: 1.2-7.5 pg/mL
16-17 years: 1.2-9.9 pg/mL
18-30 years: 0.8-7.4 pg/mL
31-40 years: 1.3-9.2 pg/mL
41-51 years: 1.1-5.8 pg/mL
Postmenopausal: 0.6-3.8 pg/mL
Tanner Stage I: Less than 2.2 pg/mL
Tanner Stage II: 0.4-4.5 pg/mL
Tanner Stage III: 1.3-7.5 pg mL
Tanner Stage IV: 1.1-15.5 pg/mL
Tanner Stage V: 0.8-9.2 pg/mL
1-6 years: Less than 0.6 pg/mL
7-9 years: 0.1-0.9 pg/mL
10-11 years: 0.1-6.3 pg/mL
12-13 years: 0.5-98.0 pg/mL
14-15 years: 3-138.0 pg/mL
16-17 years: 38.0-173.0 pg/mL
18 years and older: 47-244 pg/mL
Tanner Stage I: Less than or equal to 3.7 pg/mL
Tanner Stage II: 0.3-21 pg/mL
Tanner Stage III: 1.0-98.0 pg mL
Tanner Stage IV: 35.0-169.0 pg/mL
Tanner Stage V: 41.0-239.0 pg/mL

Interpretive Data

The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to SHBG.

Compliance Category

Laboratory Developed Test (LDT)

Note

Testosterone Free, Females and Children by tandem mass spectrometry, only provides a result for the free testosterone value (pg/mL).

Hotline History
N/A
CPT Codes

84402

Components
Component Test Code* Component Chart Name LOINC
0081096 Testosterone, Free LC-MS/MS 2991-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
Testosterone Free, Females or Children