Test Overview
Test Methodology

Colorimetric (Xylidyl Blue)

Test Usage

To aid in assessing cellular magnesium loss

Reference Range *

50 - 200 mg/24 hrs (5-20 mMol/24 hrs). Random urine collections are reported in units of mg/dL, for which reference values are not established.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Daily
Analytic Time

8 hours

Soft Order Code
MAGU
MiChart Code
Magnesium, Random Urine
Synonyms
  • MAGQ
  • Mg
  • Mg, Urine
  • MAGQ
  • Mg
  • Mg, Urine
  • MAGNESIUM URINE 24 HRS
  • MAGNESIUM URINE RANDOM
  • MAGU
  • MAGNESIUM URINE 24 HOUR
Laboratory
Chemical Pathology
Section
Automation
Specimen Requirements
Collection Instructions

Collect 24 hour urine in a clean, plastic container with no metal cap or glued insert and no preservative. Aliquot 5 mL urine into a clean, plastic container with no metal cap or glued insert and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine also acceptable.

Rejection Criteria
Specimens collected with Boric Acid preservative are not acceptable.
Normal Volume
5 mL aliquot of 24 hour urine collection or 2 mL aliquot of random urine collection.
Minimum Volume
2 mL aliquot of 24 hour urine collection or 1 mL aliquot of random urine collection.
Billing
CPT Code
83735
Fee Code
20704
LOINC
MAGU 35250-0 MAGQ 32024-2
Resources