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25040 Magnesium, Urine Random

Magnesium, Urine Random
Test Code: MG-RU
Synonyms/Keywords
Urine Magnesium, Random​
Useful For
This test is useful in assessing kidney function​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Urine, Random​
50 mg sulfamic acid aliquot tube
Tube or sage container and acidify with dilute hydrochloric acid to a pH <5 5 mL​ 2  mL ​ 1 mL​
Collection Processing Instructions
​Adjust urine pH to < 5 with sulfamic acid or dilute hydrochloric acid. Acceptable, but not preferred: collect without preservative, keep refrigerated. Acidify upon arrival to lab and prior to analysis.
Specimen Stability Information
Specimen Type Temperature Time
Urine​ Refrigerate​ 2 weeks​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ Less than 2 hours​ Xylidyl Blue Endpoint Assay/Beckman AU
Reference Range Information
Performing Location Reference Range
Marshfield​ Reference ranges have not been established for magnesium in random urine specimens​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
83735​ ​ ​ ​ ​
Synonyms/Keywords
Urine Magnesium, Random​
Ordering Applications
Ordering Application Description
​Centricity ​Magnesium-Random Urine
​Cerner ​None
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Urine, Random​
50 mg sulfamic acid aliquot tube
Tube or sage container and acidify with dilute hydrochloric acid to a pH <5 5 mL​ 2  mL ​ 1 mL​
Collection Processing
​Adjust urine pH to < 5 with sulfamic acid or dilute hydrochloric acid. Acceptable, but not preferred: collect without preservative, keep refrigerated. Acidify upon arrival to lab and prior to analysis.
Specimen Stability Information
Specimen Type Temperature Time
Urine​ Refrigerate​ 2 weeks​
Useful For
This test is useful in assessing kidney function​
Reference Range Information
Performing Location Reference Range
Marshfield​ Reference ranges have not been established for magnesium in random urine specimens​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ Less than 2 hours​ Xylidyl Blue Endpoint Assay/Beckman AU
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
83735​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.