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Test Code MG Magnesium Level 

EHR Test Codes

  Test Code Test Name
Atlas MG Magnesium Level 
Cerner SMG Magnesium Level 

Specimen Requirements

Preparation of Patient: 

None

 

Container Type: 

Green Top 5mL Lithium Heparin Separator Tube

Or

 

Gold Top 6mL SST Gel & Clot Activator Tube

Specimen Type:

Plasma or Serum

 

Specimen Volume: 

2.5 mL Plasma or Serum minimum .5 mL

 

Specimen Handling/Transport:

Separate plasma or serum from cells within 2 hours of collection.

Transport ambient room temperature.

 

Specimen Stability/Storage:

5 days refrigerated 2-8°C

Performing Laboratory

Munson Healthcare Laboratories

Chemistry Department

Priority, Frequency, & Turnaround

Priority:

STAT, ASAP, Non-Emergent

 

Frequency:

24 hours 7 days a week

 

Turnaround:

0 - 1 days

STAT 45 minute from receipt in lab

Methodology

Xylidyl blue

Reporting

Reference Range:

1.8 - 2.5 mg/dL

 

Critical Decision: 

0 years to 21 years ≤ 1.0 or ≥ 3.5 mg/dL

21 years and up ≤ 1.0 or ≥ 4.5 mg/dL

Note:  Critical values are called to the provider and communicated as critical.  Documentation of the call is recorded in the patient record.

Clinical Significance

Determination of magnesium is useful in assessing several diseases and conditions. High magnesium is associated with uremia, dehydration, diabetic acidosis, Addison's disease, and increased medicinal intake of magnesium, such as in the treatment of preeclampsia (hypertension induced by pregnancy). Low magnesium is associated with malabsorption syndrome, acute pancreatitis, hypoparathyroidism, chronic alcoholism and delirium tremens, chronic glomerulonephritis, aldosteronism, digitalis intoxication, and protracted IV feeding.

CPT Code(s)

83735