Escitalopram, Serum or Plasma

CPT: 80332
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Test Details

Synonyms

  • Lexapro®

Use

Therapeutic drug management

Limitations

Escitalopram is not differentiated from racemic citalopram by this assay.

Methodology

High-pressure liquid chromatography with fluorescence detection (HPLC/FL).

Reference Interval

Steady-state plasma concentrations of escitalopram in patients receiving recommended daily dosages: up to 60 ng/mL

Specimen Requirements

Specimen

Serum or plasma

Volume

2 mL

Minimum Volume

0.5 mL

Container

Red-top tube or lavender-top (EDTA) tube. Gel-barrier tubes are not recommended.

Collection

Serum or plasma must be separated from cells within 45 minutes of venipuncture.

Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.

Stability Requirements

Temperature

Period

Room temperature

3 days

Refrigerated

3 days

Frozen

2 weeks

Causes for Rejection

Gel-barrier tubes

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
247200 Escitalopram, SP 247201 Escitalopram ng/mL 34405-1
247200 Escitalopram, SP 247202 Desmethylcitalopram ng/mL 35106-4
247200 Escitalopram, SP 247203 Escitalopram N/A

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The LOINC® codes are copyright © 1994-2017, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf