Free (MN + NMN)

LOINC codes: 29142-7, 38494-1, 57462-4
Tests that measure Free (MN + NMN): Quest Diagnostics 1

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, Metanephrines, Fractionated, Free, LC/MS/MS, Plasma 19548

Population	Interval
Metanephrine, Free	≤57 pg/mL
Normetanephrine, Free	≤148 pg/mL
Total, Free (MN + NMN)	≤205 pg/mL

Quest Diagnostics test catalog, 19548

Tests

Check the catalog code, specimen, method and preparation for every test that measures Free (MN + NMN). Select up to five tests to compare them side by side.

Quest Diagnostics 1 test

Panels that include this biomarker

Metanephrines, Fractionated, Free, LC/MS/MS, Plasma 19548
3 analytes · Plasma · Fasting not stated · Turnaround Set up: Mon-Sat (p.m.); Report available: 5-6 days
Method and collection
Method
Chromatography/Mass Spectrometry
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.
Collection
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.
Quest Diagnostics catalog page

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Sources

Quest Diagnostics test catalog
1 test: codes, specimens, methods, preparation and reference intervals.
LOINC 29142-7, 38494-1, 57462-4
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for Free (MN + NMN)
Registered studies that measure Free (MN + NMN), on the U.S. National Library of Medicine registry.

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.

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