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Test Code
DHTTR
Test Name
Dihydrotestosterone
CPT Codes
82642
Expected Turnaround Time
2 - 8 days
Clinical Utility

Useful for monitoring patients receiving 5-alpha reductase inhibitor therapy or chemotherapy and for evaluating patients with possible 5-alpha reductase deficiency.
Specimen and Container Info

Specimen Type: Serum

Preferred Collection Container: Red Top, Plain

Alternate Collection Container: Gold Top, Serum Separator

Desired Specimen Volume: 1 mL
Collection Instructions
  1. Collect a red top, plain tube via venipuncture.
Processing and Submission Instructions
  1. Separate serum from cells.
  2. Transfer 1 mL of serum to a clear aliquot tube (screw cap).
Transport Instructions

Transport to the laboratory refrigerated.
Stability Requirements

Room Temperature

28 days

Refrigerated

28 days

Frozen

90 days
Methodology
Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS)
Reference Intervals

 See patient report.
Limitations

Patients with benign prostatic hyperplasia or prostatic cancer may not have elevated dihydrotestosterone (DHT) levels even though growth of the prostate gland may be stimulated by DHT.
Alternate Names
  • 5-a-dihydrotestosterone
  • 5-Alpha-Dihydrotestosterone
  • Allodihydrotestosterone
  • Androstanolone
  • DHT
  • Serum Dihydrotestosterone
  • Stanolone
Reference Lab
Mayo Clinic Laboratories
Testing Schedule
Routine, 3 times per week
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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