Phenobarbital

Phenobarbital

Test Code

708
80184
CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.
708
80184
CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.

Clinical Significance

Phenobarbital - Phenobarbital is an anticonvulsant used for the long-term treatment of generalized tonic-clonic (grand mal) seizures and cortical focal seizures. Phenobarbital levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.

Test Resources

Topic Brief

Drug Half-Life, Steady State, and Recommended Sample Collection Time

Test Details

Patient Preparation

Collect just prior to next dose

Methodology

Immunoassay (IA)

Reference Range(s)

15.0-40.0 mg/L

Alternative Name(s)

Quandrinal™, Donnatal®, Luminal®

LOINC® Codes, Performing Laboratory

Service Area must be determined
Collect just prior to next dose

Methodology

Immunoassay (IA)

Reference Range(s)

15.0-40.0 mg/L

Alternative Name(s)

Quandrinal™, Donnatal®, Luminal®
Service Area must be determined

Preferred Specimen(s)

1 mL serum collected in a red-top tube (no gel)

Alternative Specimen(s)

Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube or EDTA (lavender-top) tube

Minimum Volume

0.2 mL

Transport Container

Transport tube

Transport Temperature

Room temperature

Specimen Stability

  • Room temperature: 5 days
  • Refrigerated: 7 days
  • Frozen: 30 days

Reject Criteria

Serum separator tube (SST)

Setup Schedule

Service Area must be determined
1 mL serum collected in a red-top tube (no gel)
Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube or EDTA (lavender-top) tube
0.2 mL
Transport tube
Room temperature
Room temperature: 5 days
Refrigerated: 7 days
Frozen: 30 days
Serum separator tube (SST)
Service Area must be determined
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.
Test Details

Clinical Significance

Test Resources

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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