Morphine-Total (Conjugated and Unconjugated), Serum/Plasma

Test Code

CPT Codes

Preferred Specimen
1 mL serum collected in a red-top tube (no gel)

Minimum Volume
0.24 mL

Other Acceptable Specimens
1 mL plasma collected in: EDTA (lavender-top) tube, or EDTA (pink-top) tube

Promptly centrifuge and separate serum or plasma into a plastic, preservative-free screw-capped vial using approved guidelines.

Transport Container
Plastic screw-cap vial, preservative-free

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 30 days
Refrigerated: 30 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Polymer gel separation tube (SST or PST)

High Performance Liquid Chromatography/Tandem Mass Spectrometry (HPLC/MS/MS)

Setup Schedule
Set up: Mon-Fri a.m.; Report available: 6 days

Reference Range

Chronic pain patients receiving an averageof 90 mg (range 20-1460) daily oral morphine had average serum concentrations of 73 ng/mL (range 13-710) morphine

Performing Laboratory
National Medical Services
3701 Welsh Rd
Willow Grove, PA 19090

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.