TESTOSTERONE FREE (DIRECT) SERUM WITH TOTAL TESTOSTERONE
General Information
HLAB/HOL Code: TESFT
UPHSM LIS Test #: 027119
Schedule:
Testing Time: 1-3 Days
Testing Lab: LabCorp
UPHSM LIS Test #: 027119
Schedule:
Testing Time: 1-3 Days
Testing Lab: LabCorp
Specimen Info
Only 1 specimen type required, unless otherwise specified
Volume: 2.5 mL
Temperature: Refrigerate
Tube Type: Serum
Collection Info:
Minimum Volume: 1.5 mL (Note: This volume does not allow for repeat testing.)
Container: Red-top tube or gel-barrier tube
Collection: If a red-top tube is used, transfer separated serum to a plastic transport tube.
State patient's age and sex on the test request form. This panel includes Testosterone, Total which may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
Temperature: Refrigerate
Tube Type: Serum
Collection Info:
Minimum Volume: 1.5 mL (Note: This volume does not allow for repeat testing.)
Container: Red-top tube or gel-barrier tube
Collection: If a red-top tube is used, transfer separated serum to a plastic transport tube.
State patient's age and sex on the test request form. This panel includes Testosterone, Total which may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
Specimen Acceptability
Cause for Rejection:
Gross lipemia (may yield erroneously high free testosterone results); plasma specimen
Gross lipemia (may yield erroneously high free testosterone results); plasma specimen
Methods
Free: Direct analog enzyme immunoassay (EIA); Total: electrochemiluminescence immunoassay (ECLIA)
Clinical Utilities
Use: Evaluate hirsutism and masculinization in women; evaluate testicular function in clinical states where the testosterone binding proteins may be altered (obesity, cirrhosis, thyroid disorders)
Limitations: A pediatric reference interval has not been established for the direct free testosterone test.
Limitations: A pediatric reference interval has not been established for the direct free testosterone test.
CPT Codes
84402, 84403
* The CPT codes provided 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 payer being billed.
Reference Range
See Report
