Metanephrines, Fractionated, Free, LC/MS/MS, Plasma
Test code
CPT code(s)*
Clinical significance
Test resources
Details
Includes
Metanephrine, Free
Normetanephrine, Free
Total, Free (MN + NMN)
Methodology
Chromatography/Mass Spectrometry
Assay category
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Alternative name(s)
Metanephrines, Fractionated,LC-MS/MS, Plasma,Free Metanephrines
Specimen requirements | |
|---|---|
| Patient preparation | Patients should be relaxed in either a supine or upright position before blood is drawn. Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection. Overnight fasting is preferred. |
| Preferred specimen(s) | 2.5 mL plasma collected in an EDTA (lavender-top) tube |
| Minimum volume | 1.5 mL |
| Collection instructions | Draw specimen in a pre-chilled EDTA lavender-top Vacutainer™. The whole blood sample should be kept on wet ice until centrifuged (preferably at 4° C) to separate the plasma within 2 hours of venipuncture. After centrifugation, the plasma should be transferred to a transport tube and immediately refrigerated. |
| Transport container | Transport tube |
| Transport temperature | Refrigerated (cold packs) |
| Specimen stability | Room temperature: 24 hours Refrigerated: 14 days Frozen: 30 days |
| Reject criteria | Heparinized plasma • Serum • CSF • Urine |
Reference Range(s)
| Metanephrine, Free | ≤57 pg/mL |
| Normetanephrine, Free | ≤148 pg/mL |
| Total, Free (MN + NMN) | ≤205 pg/mL |
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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