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Labcorp Oklahoma, Inc.
Test Directory


Index:

Phenobarbital Level

Order Name PHENOBARB
Test Number: 4003300
Revision Date 05/28/2021
Test Name Methodology LOINC Code
Phenobarbital Level
Enzyme Immunoassay 3948-7 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Alternate 1 1 mL (0.5) Serum Clot Activator SST Refrigerated
Instructions Draw specimen same time each day. Specimen stability: Ambient 7 days, Refrigerated 6 months, Frozen 6 months
GENERAL INFORMATION
Testing Schedule Daily 
Expected TAT 1-2 days  
Notes For toxicology use.
CPT Code(s) 80184
Lab Section Chemistry