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83132
MORPHINE, UNCONJUGATED, SERUM

Test Code 83132 
Test MORPHINE, UNCONJUGATED, SERUM 
Methodology Gas Chromatography-Mass Spectrometry/Selected Ion
Monitoring (GC-MS/SIM) 
Description Caution:
This test quantifies unconjugated morphine. This test does not quantify M-3-G and M-6-G. This test cannot distinguish the source of morphine from heroin, codeine, or prescription morphine. 
Specimen Draw blood in a plain red-top tube. (SERUM GEL TUBE IS NOT ACCEPTABLE.) Spin down and send 2.0 mL of serum refrigerated. 
Reference Values Therapeutic: 70 - 450 ng/mL
Tolerant patients: < 1,500 ng/mL
Toxicity: > 700 ng/mL 
Analytic Time 2 Days 
Day(s) Test Set Up Monday through Friday 
CPT Code(s) 83925