TESTOSTERONE FREE ONLY MALE

Mnemonic

TESTOS FM

Synonym

Free Testosterone - Free T - Testosterone Free

Includes

Free Testosterone

Specimen Collection Requirements

Collect

Serum, one 5.0 mL gold (SST) or 7.0 mL red top tube

Handling

Allow serum to clot completely at room temperature (minimum: 30 minutes). Centrifuge and separate serum from cells within two hours of collection.

Preferred Volume

2.0 mL serum

Minimum Volume

0.6 mL serum

Transport

Refrigerated (2-8°C)

Rejection Criteria

Plasma, grossly hemolyzed, specimens that have been frozen and thawed more than once

Stability

Ambient (20-25°C): 4 hours; Refrigerated (2-8°C); Frozen (≤20°C): 1 month

Testing Information

Performed

Tue - Sat

Method

Chemiluminescent Immunoassay

Reference Values

Reference Values

AGE:
16-17 years
≥18 years
Tanner IV
Tanner V
FREE TESTOSTERONE in MALES
38 - 173 pg/mL
47-244 pg/mL
36-169 pg/mL
41-239 pg/mL

CPT Codes

84403, 84270

Last Updated: Thursday, January 5, 2017 03:42:31 AM