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Magnesium, 24-Hour Urine with Creatinine
Test Code625
CPT Codes
82570, 83735
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
10 mL urine collected in 24-hour urine container
Minimum Volume
1 mL
Other Acceptable Specimens
10 mL concentrated Glacial acetic acid • 10 g boric acid
Acceptable to add preservative after collection
Acceptable to add preservative after collection
Instructions
Please submit a 10 mL aliquot of a 24-hour collection. Collect urine with 25 mL of 6N HCl to maintain a pH below 3. Refrigerate during and after collection. Do not include first morning specimen; collect all subsequent voidings. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous morning's first voiding. Record 24-hour urine volume on test request form and urine vial.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 90 days
Refrigerated: 7 days
Frozen: 90 days
Methodology
Spectrophotometry (SP)
Setup Schedule
P.M. Sets up 5 days a week.
Report Available
Reports in 2 to 5 days.
