Gamma-Hydroxybutyric Acid  Screen, Serum/Plasma

Test Code

Quest Code

Alias/See Also
9326SP, 37654

CPT Codes

If positive, TC 36084 Gamma-Hydroxybutyric Acid Confirmation, Serum/Plasma will be added at an additional charge (CPT code: 80368)

Preferred Specimen
5 mL serum collected in a red-top tube (no gel)

Minimum Volume
2.4 mL

Other Acceptable Specimens
Plasma collected in an EDTA (lavender-top), EDTA (pink-top) or sodium heparin (green-top) tube

Promptly centrifuge and separate serum or plasma into a plastic screw capped vial using approved guidelines

Transport Temperature

Specimen Stability
Room temperature: 30 days
Refrigerated: 30 days
Frozen: 60 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Sodium citrate (light blue-top) tube • ACD (yellow-top) tube • Serum separator tube (SST®) • Polymer gel separation tube (PST)

Gas Chromatography/Mass Spectrometry (GC/MS)

Setup Schedule
Set up: Daily; Report available: 4 days (after set-up)

Reference Range
See Laboratory Report

Clinical Significance
Forensic Analysis; Exclusion Screen

Performing Laboratory
NMS Labs
200 Welsh Rd.
Horsham, PA 19044

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.