Test Catalog

Test ID: TTBS    
Testosterone, Total and Bioavailable, Serum

Useful For Suggests clinical disorders or settings where the test may be helpful

Testosterone, Total:

-Evaluation of men with symptoms or signs of possible hypogonadism, such as loss of libido, erectile dysfunction, gynecomastia, osteoporosis, infertility

-Evaluation of boys with delayed or precocious puberty

-Monitoring testosterone replacement therapy

-Monitoring antiandrogen therapy (eg, used in prostate cancer, precocious puberty, treatment of idiopathic hirsutism, male-to-female transgender disorders)

-Evaluation of women with hirsutism, virilization, and oligo-amenorrhea

-Evaluation of women with symptoms or signs of possible testosterone deficiency

-Evaluation of infants with ambiguous genitalia or virilization

-Diagnosis of androgen-secreting tumors


Testosterone, Total and Bioavailable

-This is the recommended second-level test for suspected increases or decreases in physiologically active testosterone

-Assessment of androgen status in cases with suspected or known sex hormone-binding globulin binding abnormalities

-Assessment of functional circulating testosterone in early pubertal boys and older men

-Assessment of functional circulating testosterone in women with symptoms or signs of hyperandrogenism but normal total testosterone levels

-Monitoring of testosterone therapy or antiandrogen therapy in older men and in females

Profile Information A profile is a group of laboratory tests that are ordered and performed together under a single Mayo Test ID. Profile information lists the test performed, inclusive of the test fee, when a profile is ordered and includes reporting names and individual availability.

Test IDReporting NameAvailable SeparatelyAlways Performed
BATSTestosterone, Bioavailable, SNoYes
TTSTTestosterone, Total, SYesYes

Method Name A short description of the method used to perform the test

TTST: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

BATS: Differential Precipitation

NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

Testosterone, Total and Bioavail, S

Aliases Lists additional common names for a test, as an aid in searching

Bioavailable Testosterone
NonSex Hormone Binding Globulin (SHBG)