Specimen Collection Manual and Test Catalog
MAGNESIUM
Geisinger Epic Procedure Code: LAB2644 Geisinger Epic ID: 6828SPECIMEN COLLECTION
Specimen type:
Plasma or serum
Preferred collection container:
Specimen required:
2 mL of serum or plasma; minimum 0.2 mL.
SPECIMEN PROCESSING
Processing instructions:
Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.
Transport temperature:
Refrigerated (preferred). Room temperature or frozen specimen also acceptable.
Specimen stability:
Room temperature: 7 days. Refrigerated: 7 days. Frozen: 1 year.
Rejection criteria:
Stability limits exceeded..
TEST DETAILS
Reference interval:
1.5 - 2.6 mg/dL
Critical values/courtesy alerts:
CPT code(s):
83735
Below 0.7 mg/dL; above 6.0 mg/dL
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.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Methodology:
Spectrophotometric (Colorimetric)
Synonyms:
MG
Clinical significance:
Magnesium is decreased in chronic nephritis, acute pancreatitis, and alcoholic cirrhosis. Magnesium is increased in acute or chronic renal failure and Addison's disease.
Doctoral Director(s):
Review Date:
12/27/2024
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC
Performing Locations