Magnesium is a mineral that is vital for energy production, muscle contraction, nerve function, and the maintenance of strong bones. It comes into the body through the diet and is absorbed by the small intestine and colon. Magnesium is stored in the bones, cells, and tissues.
Magnesium testing may be ordered as a follow up to chronically low blood levels of calcium and potassium. This test may also measure magnesium levels to check for a deficiency as part of an evaluation of malabsorption, malnutrition, diarrhea, or alcoholism.
Certain medications can cause the kidneys to excrete magnesium. Levels may also be checked to monitor the effectiveness of magnesium and/or calcium supplementation.
Fasting Required: Sometimes
CPT Code: 83735
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