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General Information

Supplies

Websites                            

Licensing and Accreditation

Mayo Clinic Laboratories

TEST ID TESTTTL TESTOSTERONE TOTAL

Important Note

NRLS accepts gold tubes for this test but all other testosterone testing referred to Mayo requires a RED tube. 

Performing Laboratory

NRLS-Core Chemistry

Specimen Type

Serum

Specimen Required

Container/Tube:
Preferred: Gold
Acceptable: Tiger top, Red top
Specimen Volume: 1.0 mL

Collection Instructions:

Serum gel tubes should be fully clotted and centrifuged within 2 hours of collection. 4 hours is acceptable.
Red-top tubes should be fully clotted, centrifuged and aliquoted within 2 hours of collection.4 hours is acceptable.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time 
Serum Refrigerated(preferred) 48 hours
  Ambient 8 hours
  Frozen 2 months

Reference Values

An interpretive report will be provided