DIHYDROTESTOSTERONE

Index:

Order Name DIHYDTEST
Test Number: 3609075
Revision Date 12/12/2022

Test Name	Methodology	LOINC Code
Dihydrotestosterone	High-pressure liquid chromatography (HPLC) tandem mass spectrometry.	1848-1

SPECIMEN REQUIREMENTS
Specimen	Specimen Volume (min)	Specimen Type	Specimen Container	Transport Environment
Preferred	1mL (0.5mL)	Serum	Clot Activator (SST or Red No-Gel)	Frozen
Alternate 1	1mL (0.5mL)	Plasma	Sodium Heparin (Green Top / No-Gel)	Frozen
Alternate 2	1mL (0.5mL)	Plasma	EDTA (Lavender Top)	Frozen
Instructions	Notes: 0.5 mL (Note: This volume Does NOT allow for repeat testing). Specimen Type: Red-top tube, gel-barrier tube, lavender-top (EDTA) tube or green-top (heparin) tube Specimen Storage: FREEZE Specimen Collection: Separate serum or plasma from cells within one hour of collection and Freeze..Send serum or plasma in a plastic transport tube. Transfer specimen to plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple test on frozen samples, PLEASE SUBMIT SEPARATE FROZEN SPECIMENS FOR EACH TEST REQUESTED. Special Instructions: Testing is performed at Esoterix Endocrinology Laboratory: ES#500144 Specimen Stability: Ambient: 7 days, Refrigerated : 7 days, Frozen: 19 months

GENERAL INFORMATION

Expected TAT

5 - 10 days

Clinical Use

DHT (AKA: 5-a-Dihydrotestosterone) 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.

Notes

Labcorp Test Code: 500142

CPT Code(s)

82642

Internal Comments

change 2016 82541 to 80327
LOINC 1848-1 ADDED 5/4/15

Quest has still the 82651 code - we will change to arup on 5/4 and they have 82541
---------------------
2015

3609075

82651

DIHYDTEST

80327

10/19/17 change cpt from 80327 to 82542 - JK

12/29/18 - Updated CPT (SN)

Lab Section

Reference Lab