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Epic Code LAB848 Gamma-Hydroxybutyric Acid (GHB), Urine

Reporting Name

GHB Screen, UR

Performing Laboratory

Medtox Laboratories, Inc.

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

Reject Due To

Hemolysis NA
Lipemia NA
Icterus NA
Other NA

Day(s) Performed

Monday through Sunday

Reference Values

Reference Range: Negative


Screening threshold: 5.0 ug/mL


Method Name

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

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

Report Available

5 to 9 days

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