Test Overview
Test Methodology

Bioavailable Testosterone calculated using the Vermeulen equation.

Reference Range *

Bioavailable Testosterone: Males Ages 20 – 69, 110.0– 400.0 ng/dL; Female Ages 20 – 80, 1.0 – 19.0 ng/dL. All other non-specified age ranges do not have established reference ranges. Refer to Total Testosterone (male, female or pediatric) and Sex Hormone Binding Globulin Handbook entries for reference ranges.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Testing by Immunoassay by automation is completed daily; Testing by Mass Spectrometry is performed Tuesday - Friday every week.
Analytic Time

1 - 4 days

Soft Order Code
TTBSM (Adult Males or Individuals on Testosterone Hormone Therapy) / TTBSP (Adult Females, Children or Individuals on Testosterone-Suppressing Hormone Therapy))
MiChart Code
Bioavailable Testosterone Panel
Synonyms
  • Bioavailable Testosterone
  • Testosterone, Bioavailable and Total
Laboratory
Chemical Pathology
Section
Automation
Specimen Requirements
Collection Instructions

Refer to Total Testosterone (male, female, pediatric or individuals on Testosterone Hormone Therapy) and Sex Hormone Binding Globulin Handbook entries. There is no additional specimen required for the Bioavailable Testosterone calculation.
Adult Males or Individuals on Testosterone Hormone Therapy: Collect blood in an SST tube. Centrifuge, aliquot serum into a plastic vial, and refrigerate at 2-8C.
Female and Pediatric or Individuals on Testosterone-Suppressing Hormone Therapy: Collect blood in a red top tube. Centrifuge, aliquot serum into a plastic vial, and refrigerate at 2-8C

Normal Volume

1 mL serum

Minimum Volume

0.6 mL serum

Additional Information

Panel includes Total Testosterone, Calculated Bioavailable Testosterone and Sex Hormone Binding Globulin.

Billing
CPT Code
TTBSM: 84403, 84270; TTBSP: 84403, 84270
Fee Code
TTBSM: JA038, JA039; TTBSP: KA008, JA039
LOINC
2986-8 Testosterone; 13967-5 Sex Hormone Binding Globulin
NY State Approved
No