Testosterone, Free, Bioavailable and Total, Males (Adult), Immunoassay
What it measures
- AlbuminLOINC 1751-7
- Testosterone, Total, Males (Adult), IALOINC 2986-8
- Sex Hormone Binding GlobulinLOINC 13967-5
- Testosterone, FreeLOINC 2991-8
- Testosterone,BioavailableLOINC 2990-0
Before the visit
Testosterone, Total, Males (Adult), Immunoassay: Due to changes in testosterone levels throughout the day, two morning (8:00-10:00 a.m.) specimens obtained on different days are recommended by The Endocrine Society for screening.
Specimen
- Specimen
- 2 mL serum collected in a red-top tube (no gel)
- Minimum volume
- 1.5 mL
- Also accepted
- Serum separator tube (SST)
- Container
- Transport tube
- Temperature
- Room temperature
Dietary supplements containing biotin may interfere in assays and may skew analyte results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.
Billing
CPT 82040, 84270, 84403