Magnesium, 24-Hour Urine (w/o Creatinine)

Message

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

MGU24

Alias/See Also

11322

CPT Codes
83735

Preferred Specimen

10 mL urine in 24-hour urine container 25mL 6N HCL Submit a 10 mL aliquot of a 24-Hr collection. Collect urine wth 25mL of 6N HCL to maintain a PH below 3.

Minimum Volume

1 mL

Instructions

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 Container

24-hour Urine container 24mL 6N HCL

Transport Temperature

Room Temperature

Specimen Stability

Room Temperature = 4 days
Refrigerated = 7 days
Frozen = 3 months

Methodology
Spectrophotometry

Setup Schedule

Tuesday - Friday

Report Available

1 day

Clinical Significance

Useful in the assessment of nutritional and metabolic disorder. Increased levels indicate renal and respiratory failure and dexreased levels indicate seizures, tetany, cardiac arrythmias, low CA++ and K+.

Performing Laboratory
Quest Diagnostics Nichols Institute San Juan Capistrano
33608 Ortega Highway
San Juan Capistrano, CA 92675

Last Updated: November 22, 2021

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.