Testosterone, Free & Total - Female or Children
Label Mnemonic: FTSTFC
Epic code: LAB4141
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Serum
Specimen Instructions:
Specimen should be collected between 6:00 - 10:00 a.m.
Collection Medium:
Red top tube 5 mL (Clot Activator)
Minimum:
Preferred Minimum: 1 mL serum
Absolute Minimum: 0.8 mL serum
Rejection Criteria:
EDTA plasma
Turn Around Time:
5 days upon receipt at reference laboratory
Reference Range:
         Serum Total Testosterone, Determine by LC-MS/MS
         Age                        Female           Male
Premature (26-28 weeks)           5-16 ng/dL     59-125 ng/dL 
Premature (31-35 weeks)           5-22 ng/dL     37-198 ng/dL 
Newborn                           20-64 ng/dL    75-400 ng/dL 
1-5 months                        < 20 ng/dL     14-363 ng/dL 
6-24 months                       < 9 ng/dL      < 37 ng/dL 
2-3 years                         < 20 ng/dL     < 15 ng/dL 
4-5 years                         < 30 ng/dL     < 19 ng/dL 
6-7 years                         < 7 ng/dL      < 13 ng/dL 
8-9 years                         1-11 ng/dL     2-8 ng/dL 
10-11 years                       3-32 ng/dL     2-165 ng/dL 
12-13 years                       6-50 ng/dL     3-619 ng/dL 
14-15 years                       6-52 ng/dL     31-733 ng/dL 
16-17 years                       9-58 ng/dL     158-826 ng/dL 
18-39 years                       9-55 ng/dL     300-1080 ng/dL 
40-59 years                       9-55 ng/dL     300-890 ng/dL 
60 years and older                5-32 ng/dL     300-720 ng/dL 
Premenopausal (> 18 years)        9-55 ng/dL 
Postmenopausal                    5-32 ng/dL 
Tanner Stage I                    2-17 ng/dL     2-15 ng/dL 
Tanner Stage II                   5-40 ng/dL     3-303 ng/dL 
Tanner Stage III                  10-63 ng/dL    10-851 ng/dL 
Tanner Stage IV-V                 11-62 ng/dL    162-847 ng/dL 
Interpretive Data:
The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to sex hormone binding globulin.
Comments:
This test is suggested for women and children due to an improved sensitivity of testosterone by LC-MS/MS.
Methodology:
Quantitative High Performance Liquid Chromatography/Tandem Mass 
Spectrometry/Electrochemiluminescent Immunoassay
The concentration of free testosterone is derived from a mathematical 
expression based on the constant for the binding of testosterone to sex 
hormone binding globulin.
CPT Code:
84403 Testosterone, 84270 Sex Hormone Binding Globulin