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PBQNU / PBGU-M
PORPHOBILINOGEN RANDOM UR QN

Test Code PBQNU / PBGU-M 
Test PORPHOBILINOGEN RANDOM UR QN 
Methodology Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) Stable Isotope Dilution Analysis 
Description Useful for: First-line test for evaluation of a suspected acute porphyria: acute intermittent porphyria, hereditary coproporphyria, and variegate porphyria 
Specimen Patient is to collect a random urine specimen in an amber urine container. No preservative is required but pH must be adjusted to > 5.0. Send 20 mL (minimum 15 mL) and keep protected from light. 
Reference Values < or =1.3 mcmol/L 
Analytic Time 2 days (not reported on Saturday or Sunday) 
Day(s) Test Set Up Monday through Friday 
CPT Code(s) 84110