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Test Code LAB90299 Gamma-Hydroxybutyric Acid (GHB), Urine

Additional Codes



Reflex Tests

Test ID Reporting Name Available Separately Always Performed
FGHAC Gamma-Hydroxybutyric Acid, CF, UR No No

Testing Algorithm

If the GHB Screen, UR is non-negative, then the Gamma-Hydroxybutyric Acid, CF, UR (FGHAC) will be performed at an additional charge.

Reporting Name

GHB Screen, UR

Specimen Type


Specimen Required

Collect 10 mL random urine without preservatives. Ship refrigerated in a plastic container.

Specimen Minimum Volume

1.2 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 14 days
  Frozen  180 days
  Ambient  72 hours

Reference Values

Reference Range: Negative


Screening threshold: 5.0 ug/mL


Day(s) and Time(s) Performed

Monday through Sunday

Performing Laboratory

Medtox Laboratories, Inc.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FGHSU GHB Screen, UR 29868-7


Result ID Test Result Name Result LOINC Value
Z4226 GHB 29868-7

Method Name

Liquid Chromatography with Tandem Mass Spectrometry (LC/MS/MS)

Gas Chromatography/Mass Spectrometry (GC/MS) (if appropriate)