Morphine, Free (Unconjugated), Serum

Test Code

6215

CPT Codes
80361

Preferred Specimen

5 mL serum collected in a red-top tube (no gel)

Minimum Volume

2.5 mL

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 14 days
Frozen: 14 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Serum separator tube

Methodology
Chromatography/Mass Spectrometry

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Tuesday, Thursday, Saturday Evening
Report available: 3 Days

Reference Range

10.0-80.0 ng/mL	Therapeutic (for surgical anaesthesia)
≥200.0 ng/mL	Potentially toxic (and/or potential side effects)

Clinical Significance

Therapeutic drug monitoring and confirmation of screen- positive results. Morphine is an active component of Depodur, Roxanol, etc. Serum half-life is 1.3 to 6.7 hours.

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.