Vanderbilt Pathology Laboratory Services

TESTOSTERONE (TST)

Department: Chemistry
Test Synonym(s): TST
CPT Codes: 84403
Methodology: Competitive Binding Immunoenzymatic Assay
Reference Range: Male: 2 - 11 ng/mL, Female: 0.1 - 0.6 ng/mL
Tube Type: Light green PST (Lithium Heparin with gel) tube - 4.5 mL
Specimen: Plasma, Serum
Alternate Specimen: Red top tube - 5 mL
Pediatric Requirements: 2 microtainers
Volume: 3 mL plasma
Minimum Volume: 0.7 mL plasma
Temperature: Separate within one hour and store at 2-8ºC until delivery
Stability: Freeze @ -20 degrees C if unable to test immediately
Reasons for Rejection: Hemolysis; improper collection
Days Performed: Daily
Times Performed: Continuous
TAT: STAT: 1 hour; ROUTINE: 2 hours after receiving in lab

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