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3315UR: Metanephrines, Fractionated Urine Random Print View
Normetanephrine Random Urine HPLC  By Report  ug/L 
Metanephrine Random Urine HPLC  By Report  ug/L 
Creatinine, Random Urine C  view ref range  mg/dL 
Normetanephrine/Creatinine Ratio CALC  < 700  ug/g creat 
Metanephrine/Creatinine Ratio CALC  < 300  ug/g creat 

PRIMARY
1 Urine 10 (5) mL   Frozen - 60 Day(s)/Refrigerated - 14 Day(s) See COLLECTION INSTRUCTIONS/// 
ALTERNATE

The measurement of urine metanephrines is considered the single most reliable screening test for pheochromocytoma. This test is almost 100% sensitive with no false-negatives. False positives tests results are seen, however, in times of severe stress or in patients taking MAO inhibitors. In order to maximize sensitivity and specificity, measurements of VMA and free catecholamines in urine are also usually included in the initial assessment. These tests are slightly less sensitive, but are more specific.

If possible, patients should discontinue all drugs at least 1 week
prior to collection. Medications that can interfere with the assay
include: L-DOPA, Alpha-methyldopa (Aldomet), Buspirone, Codeine,
Isoetharine, Isoproterenol, Mandelamine, Metoclopramide, Acetaminophen
(high concentrations only), Labetalol, Catecholamine-containing
drugs, MAO inhibitors, diuretics and vasodilators.
Store and ship refrigerated.
Acid additive (hydrochloric, nitric or acetic acid) is acceptable
but not necessary if the specimen is refrigerated during collection
and transportation.
Setup Schedule
Tuesday-Saturday

Reported (Analytical Time)
Next day

CPT Codes
82570, 83835

The CPT codes provided 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 payer being billed.






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