Dihydrotestosterone

DHT, Dihydrotestosterone, Serum

Test Codes

EPIC: LAB1232043, Beaker: Dihydrotest, Quest: 90567

Department

Send Outs

Specimen Collection Criteria

Collect: One plain Red-top tube.

Do not use Serum Separator Tubes (SST).

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to a plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Preparation for Courier Transport

Transport: 1.0 mL serum, at room temperature (20-26°C or 68-78.8°F). (Minimum: 0.6 mL)

Rejection Criteria

• Moderate to gross hemolysis.
• Serum separator tube (SST).
• Plasma.
• Grossly icteric.
• Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to a plastic transport tube and room temperature (20-26°C or 68-78.8°F).

Transport: 1.0 mL serum, at room temperature (20-26°C or 68-78.8°F). (Minimum: 0.6 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 7 days
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 6 months

Specimen Storage in Department Prior to Disposal: 2 Weeks

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Quest Diagnostics, Wood Dale, IL.

Performed

Sunday – Friday.
Results available in 3-5 days.

Reference Range

Female	≤20 ng/dL
Male	12-65 ng/dL

Test Methodology

Chromatography / Mass Spectrometry

CPT Codes

82642

Contacts

Last Updated

12/17/2025