14 ordering services comparedPrices last checked 19 hours ago
Measures magnesium levels inside red blood cells, reflecting longer-term magnesium status than a standard serum test. Used to evaluate magnesium deficiency, particularly when serum magnesium appears normal despite symptoms.
These are online lab ordering services — not the physical draw site. Once you purchase a requisition, you visit a nearby Quest or LabCorp patient service center for your blood draw. Prices are self-pay cash rates and may vary by location.