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Test Code LAB3102 Metanephrines, Fractionated, Free, Plasma

Additional Codes

Mayo Test Code: PMET

Reporting Name

Metanephrines, Fract., Free, P

Useful For

Screening test for presumptive diagnosis of catecholamine-secreting pheochromocytomas or paragangliomas

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Plasma EDTA

Specimen Required

Collection Container/Tube: Lavender top (EDTA)

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Specimen Minimum Volume

0.3 mL

Specimen Stability Information

Specimen Type Temperature Time
Plasma EDTA Frozen (preferred) 14 days
  Refrigerated  7 days

Reject Due To


Mild OK; Moderate-reject if hemoglobin concentration is >250 mg/dL


Mild OK; Gross OK


Mild OK; Gross OK



Reference Values


<0.50 nmol/L



<0.90 nmol/L

Day(s) and Time(s) Performed

Monday through Saturday; 1 p.m.

Not reported on Sunday

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
PMET Metanephrines, Fract., Free, P 57772-6


Result ID Test Result Name Result LOINC Value
10140 Normetanephrine, Free 40851-8
10139 Metanephrine, Free 49700-8

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.


If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

General Request Form (T239) (

Oncology Test Request Form (T729) (