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DOXEP / 007609L
DOXEPIN, PLASMA OR SERUM

Test Code DOXEP / 007609L 
Test DOXEPIN, PLASMA OR SERUM 
Methodology High-Pressure Liquid Chromatography (HPLC) 
Description Useful for monitoring therapeutic levels and evaluating toxicity. 
Specimen Draw blood in either a plain red-top or lavender-top (EDTA) tube. (SERUM GEL TUBE IS NOT ACCEPTABLE.) Spin down and send 2.0 mL (minimum volume: 0.6 mL) of serum or plasma refrigerated in a plastic screw-capped vial. 
Reference Values Therapeutic:
Doxepin + nordoxepin: 50-100 ng/mL
Potentially toxic: > 500 ng/mL 
Analytic Time 1Day 
Day(s) Test Set Up Tuesday through Friday 
CPT Code(s) 80335  
G0480 or  G0481 or G0482 or G0483, Drug test(s), definitive (Government payers, if appropriate), if indicated