Test Overview
Test Methodology

Screen: Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS), Confirmation: Gas Chromatography/Mass Spectrometry (GC/MS)

Test Usage

Detection of gamma hydroxy butyrate in urine.

Reference Range *

Negative (screening threshold 5 mcg/mL).

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

The expected detection period (dose-dependent) is 3 - 10 hours.

Test Details
Days Set Up
Daily
Analytic Time

7 - 9 days

Soft Order Code
MMLR
Synonyms
  • Gamma Hydroxybutyric Acid
  • Gamma OH-butyrate
  • Date Rape Drug
  • Drug Screen, Gamma Hydroxy Butyrate
  • GHB
  • Gamma-Hydroxybutyric Acid (GHB)
Laboratory
Sendout
Reference Laboratory
Mayo FGHSU (58036) (MedTox 19255)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect random urine specimen and refrigerate.

Alternate Specimen
Serum (Red top or SST) or plasma (green top) (5 mL/min 3 mL/Refrigerate) sent to Mayo Wild 80 (MedTox 365).
Normal Volume
10 mL urine
Minimum Volume
1.5 mL urine
Additional Information

If the GHB Screen is non-negative, GHB Confirmation (FGHAC) will be performed at an additional charge. By ordering this test the clinician acknowledges that additional reflex testing will be performed and billed at a separate additional charge if indicated. Test sent to Mayo Medical Laboratories; performed by MedTox Laboratories.

Billing
CPT Code
80307
Fee Code
20533
Reflex CPT
80368
LOINC
29868-7
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