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Labcorp Oklahoma, Inc.
Test Directory


Index:

Naproxen Level

Order Name NAPROXEN
Test Number: 4003230
Revision Date 12/12/2022
Test Name Methodology LOINC Code
Naproxen Level
High Performance Liquid Chromatography 3846-3 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5 mL) Serum Clot Activator (Red Top, No-Gel) Refrigerated
Alternate 1 1 mL (0.5 mL) Plasma Lithium Heparin (Dark Green Top / No-Gel) Refrigerated
Instructions Specimen Type: Red-top tube or green-top (heparin) tube. Gel-barrier tubes are NOT recommended.
Specimen Storage: SUBMISSION/TRANSPORT (<3 days): Room Temperature. For storage beyond three days, specimen should be refrigerated or frozen.
Specimen Collection: Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.
Special Instructions: Testing referred to MedTox Laboratories Inc TC 366
GENERAL INFORMATION
Expected TAT 7 - 14 days  
Performing Labcorp Test Code 808374 
Notes Labcorp Test Code: 808374
CPT Code(s) 80329 (HCPCS:80299)
Lab Section Reference Lab