Geisinger Medical Laboratories Test Catalog

MAGNESIUM, RANDOM URINE (WITH CREATININE) AA
ORDERING INFORMATION:	Geisinger Epic Procedure Code: LAB2647 Geisinger Epic ID: 46337
SPECIMEN COLLECTION
Specimen type:	Preserved random urine
Preferred collection container:	Non-sterile specimen container
Specimen required:	10 mL of a well-mixed, preserved random urine
Special notes:	Please submit 10 mL of a well-mixed random urine. Adjust pH to < 3.0 with 6N HCl before aliquoting for testing. Refrigerate during and after collection.
SPECIMEN PROCESSING
Transport temperature:	Refrigerated.
Specimen stability:	Room temperature: 4 days. Refrigerated: 7 days. Frozen: 90 days.
TEST DETAILS
CPT code(s):	82570, 83735
	Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:	Creatinine.
Methodology:	Atomic Absorption Spectrophotometry (AAS)
Synonyms:	Quest code 14460 MAGRU
Clinical significance:	Urinary magnesium concentrations often decline before serum concentrations. Adverse effects, such as cardiac arrhythmias, can be observed while serum concentrations are within range.