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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 24-hour 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.
