Last Modified: 7/14/2016 4:17:00 PM

Specimen Requirements:

1.0 mL Serum from a Red Top Tube in a Plastic Vial

Collection Instructions: Centrifuge and separate serum within 1 hour of collection, transfer serum to a clean, plastic, screw-cap vial.
Minimum Volume: 0.4 mL Serum
Transport & Storage: Temperature/Stability: 30 days Ambient
30 days Refrigerated
30 days Frozen

Avoid freeze/thaw cycles
Rejection Criteria: Polymer gel separation tube (SST or PST).
Reference Range: Steady-state peak plasma levels from patients on regimen of  10 or 30 mg/day: 21 and 64 ng/mL, respecitvely, and occur at approximately 4 hours post dose.
This test is not Chiral specific. Patients who have taken Racemic Citalopram (Celexa®), as opposed to Escitalopram (Lexapro®), within the past 3 days may have falsely elevated values.
Methodology: High Performance Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Clinical Significance: Therapeutic Drug Monitoring Antidepressant
Custom Panel: No


Turn Around Time: 3 to 4 days
Days Performed: Tuesday, Thursday
Sites Performed: Quest - Chantilly to NMS Laboratories
PHL Test Code: MSOT
EPIC Test Code:
Send Out Test Code: 15857 [15857X]
Alternate Test Names: Celexa®; Escitalopram; Lexapro®
CPT Coding: 80332

Go back to the top of the page.