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St. John Health System
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Index:

Clonazepam Level

Order Name CLONAZEPA
Test Number: 4001540
Revision Date 12/12/2022
Test Name Methodology LOINC Code
Clonazepam Level
High Performance Liquid Chromatography 3494-2 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 4 mL (1.1) Plasma EDTA (Lavender Top) Refrigerated
Alternate 1 4 mL (1.1) Serum Clot Activator (Red Top, No-Gel) Refrigerated
Alternate 2 1 mL (0.1) Plasma Sodium Heparin (Green Top / No-Gel) Refrigerated
Instructions Specimen Type: Red-top tube, lavender-top (EDTA) tube OR green-top (heparin) tube. DO NOT USE A GEL-BARRIER TUBE. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.
Specimen Storage: Refrigerate
Specimen Collection: Transfer separated serum or plasma to a plastic transport tube. Collect specimen immediately prior to next dose unless specified otherwise.
Specimen Stability: Ambient: 14 days, Refrigerated : 14 days, Frozen: 14 days
GENERAL INFORMATION
Expected TAT 2 - 4 days working day.  
Notes Labcorp Test Code: 071712
CPT Code(s) 80346 (Alt code: G0480)
Service Provided By Labcorp Oklahoma, Inc.
Lab Section Reference Lab