Dihydrotestosterone 90567

Test Code

DIHYDROTE

CPT Codes
82642

Preferred Specimen

1 mL serum collected in a red-top tube (no gel)

Minimum Volume

0.6 mL

Other Acceptable Specimens

Plasma from a lavender top EDTA tube is no longer acceptable.

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 14 days
Frozen: 6 months

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Moderate to gross hemolysis • Grossly icteric • Serum separator tube (SST) • Plasma

Methodology
Chromatography/Mass Spectrometry

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Sun-Fri; Report available: 2-5 days

Reference Range

Female	≤20 ng/dL
Male	12-65 ng/dL

Clinical Significance

DHT is a potent androgen derived from testosterone via 5-Alpha-Reductase activity. 5-Alpha-Reductase deficiency results in incompletely virilized males (phenotypic females). This diagnosis is supported by an elevated ratio of testosterone to DHT.

Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.