ARUP's Laboratory Test Directory

Clonazepam : 0090055

Mnemonic: CLON

Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed: Sun-Sat
Reported: 1-4 days
Specimen Required: Collect: Plain red. Also acceptable: Lavender (K2 or K3EDTA) or pink (K2EDTA).

Specimen Preparation: Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution).

Stability (collection to initiation of testing): After separation from cells: Ambient: 6 weeks; Refrigerated: 6 weeks; Frozen: 2 months

Reference Interval:
Dose-Related Range:
10-75 ng/mL - based on dosages up to 6 mg/d
Toxic: >100 ng/mL
CPT Code(s): 80154
Cross References: Klonopin (Clonazepam), Pain Management, Clonazepam Metabolite, Quantitative, w/ medMATCH, Urine (Clonazepam), Rivotril (Clonazepam)