MAGNESIUM, serum (087-0663)
CPT 4 Code: 83735
Limited Coverage Test (LCD)
Test Order Mnemonic: MG
Lab: Clinical Chemistry
Request Form: Routine Chemistry Form 1
Collection: Routine venipuncture
Storage Instructions: Centrifuge the specimen to
separate serum from cells within 2 hours of collection. Refrigerate at 2-8°C.
Causes for Rejection: Gross hemolysis, improperly
labeled specimen, sample QNS, sample not separated from cells
Availability: Samples are received 24 hours per day
at Sample Management, Room 5.136 McCullough.
Turnaround Time: Routine: 4 hours; STAT: 1 hour
Specimen: Blood
Volume: 7 mL blood
Minimum Volume: 0.5 mL serum
Container: SST (gel barrier) or red-topped tube
Reference Ranges: 1.7-2.4 mg/dL
Significant Values: <1.2 or >4.0 mg/dL
Significant Values: L&D <1.2 or >10.0 mg/dL
Test Method: Colorimetric
Reviewed/revised April 2007 by P. Harris
