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Test ID FGHSU Gamma-Hydroxybutyric Acid (GHB), Urine

Method Name

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

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

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 Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  180 days
  Ambient  72 hours

Reference Values

Reference Range: Negative


Screening threshold: 5.0 ug/mL


Day(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

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.

Report Available

5 to 9 days

NY State Approved