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  • 91332

Gamma-Hydroxybutyric Acid, Serum or Plasma

Also known as: GHB, Serum, Hydroxy-Butyric Acid, Serum

Specimen:

Collect

  • One Red Top

Also Acceptable:
  • One Lavender (EDTA)
  • One Pink Top (EDTA)

Submit

  • 1 mL (Min:0.5 mL) Serum . Submit Refrigerated. Submit in a Standard Transport Tube.

Also Acceptable:
  • 1 mL (Min:0.5 mL) Plasma . Submit Refrigerated. Submit in a Standard Transport Tube.

Special Handling

  • Separate serum from cells ASAP or within 2 hours of collection
  • Separate aliquot must be submitted when multiple tests are ordered.

    Note: If gamma-hydroxybutyric acid is detected, then confirmation testing will be added.

Rejection Criteria

  • Use of separator tubes
  • Citrate buffered tubes

Stability

Ambient: 1 Month(s); Refrigerated: 1 Month(s); Frozen: 2 Month(s); Incubated: Unacceptable

Methodology

  • Quantitative Gas Chromatography - Tandem Mass Spectrometry

Performed

Varies

Reported

6-13 Day(s)

CPT Codes

  • 80307

Components

  • 91332 - GHB, SERUM
Last Updated: August 19, 2026 @ 9:13 am

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Common Lab Definitions

  • Serum 
  • Plasma 
  • STT