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Specimen Collection Manual and Test Catalog

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TESTOSTERONE, FREE (DIALYSIS) AND TOTAL, MS

Geisinger Epic Procedure Code:  LAB3137    Geisinger Epic ID:  34071

SPECIMEN COLLECTION
Specimen type: 

Serum (preferred) or plasma.


Preferred collection container: 
Alternate collection container: 
3 mL green/black top lithium heparin tube
4 mL green/green-top (sodium heparin) tube
Specimen required: 

1.8 mL aliquot serum or plasma; minimum 0.9 mL.


Special notes: 

Serum separator tubes are unacceptable.



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot (10-15 minutes) at room temperature. Centrifuge and separate the serum from the cells.


Transport temperature: 

Refrigerated.


Specimen stability: 

Room temperature: 1 week. Refrigerated: 21 days. Frozen: 2 years (-20ºC).


Rejection criteria: 

Stability limits exceeded. Serum separator tubes unacceptable. Gross hemolysis. Gross lipemia.



TEST DETAILS
CPT code(s):  84402, 84403
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

Testosterone, Total, MS and Testosterone, Free (Dialysis).


Methodology: 
Calculation
Chromatography/Mass Spectrometry
Equilibrium Dialysis
Synonyms: 

Testosterone, Free and Total, MS, Quest test code 36170, Free testosterone by equilibrium dialysis, TESTEQ


Clinical significance: 

Test is helpful in accessing testicular function in males and in managing hirsuitism and virilization in females.


Review Date:  12/03/2024

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