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Testosterone, Free

Source Blood 
Mnemonic TESTOBIOFR 
Specimen Requirements

Test is user pay. Patient must pay $50.00 at time of collection.
When both Free and Bioavailable Testosterone are ordered together, the patient will pay one fee of $50.00 for both tests.

1 x 5mL gold top SST tube

1 mL serum

Recommend collecting blood between 07:00 and 10:00.

 
Specimen Handling  
Additional Information

Free Testosterone is done as a single test or can be ordered with Bioavailable Testosterone.

The concentration of Free Testosterone is derived from a mathematical expression based on constants for the binding of Testosterone to Sex Hormone Binding Globulin and Albumin. 
Testing Location RIA 
Testing Frequency Weekdays 
Alternate Name(s) Free Testosterone 
Reference Interval

Adult male

175-700 pmol/L

Adult female

2-30 pmol/L

 


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