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Test Code UMG24 Magnesium, Urine, Timed

Additional Codes

St. Luke's Compendium Code (Iatric): L650.1925

Performing Laboratory

St. Lukes Hospital Laboratory

Methodology

Methylthymol Blue (MTB)

Specimen Requirements

10 mL from a well-mixed, 24-hour urine collection. 25mL of 6N Hydrochloric Acid should be used as a preservative. Refrigerate specimen during collection, and send specimen refrigerated.
Note:  1. 24-Hour volume  and starting and ending times are required on request form for processing.
2. Follow instructions in “Urine Collection” in “Special Instructions.”

Reference Values

24-255 mg/24 hr

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

83735

Special Instructions