Magnesium, RBC

Quest#623
LabCorp#080283
18 ordering services comparedPrices last checked 3 days ago

Magnesium, RBC measures the amount of magnesium inside red blood cells rather than in the liquid part of the blood (serum). Because most of the body's magnesium is stored inside cells, this test can reflect magnesium status differently than a standard serum magnesium test. Magnesium is a mineral involved in many body processes, including muscle and nerve function, energy production, and maintaining normal heart rhythm. This test is used to help assess a person's magnesium status. Some clinicians consider RBC magnesium a way to evaluate longer-term or intracellular magnesium levels, which may not always be reflected by serum magnesium. It may be ordered when magnesium deficiency is suspected despite a normal serum result, or to monitor magnesium status over time.

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How much does a Magnesium, RBC test cost?

The cheapest self-pay Magnesium, RBC test is $3.03 at Mito Health, out of 18 ordering services compared. The highest listed price is $99.00 at True Health Labs, a difference of $95.97. It is Quest test code 623 and LabCorp test code 080283. Prices are self-pay cash rates read from each service’s own public catalog, last verified 3 days ago.

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Mito Health · $3.03
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Magnesium, RBC self-pay prices by ordering service, last checked 3 days ago
Ordering ServicePriceOrder
Mito Health✓ Best Pricechecked 3 days ago$3.03$2.16 for members ($9/mo membership)Order
Good Labschecked 3 days ago$13.00Order
DrSayschecked 3 days ago$19.99Order
Marek Diagnosticschecked 3 days ago$20.00Order
AlgoRxchecked 3 days ago$21.00Order
Anabolic Insightschecked 3 days ago$24.00$24.00 via LabCorp also availableOrder
Jason Healthchecked 3 days ago$25.00Order
Own Your Labschecked 3 days ago$37.20Order
Quest Healthchecked 3 days ago$39.00Order
LabCorp OnDemandchecked 3 days ago$39.00Order
Request A Testchecked 3 days ago$49.00Order
Walk-In Labchecked 3 days ago$49.00Order
DirectLabschecked 3 days ago$49.00Order
Personalabschecked 3 days ago$53.20Order
Private MD Labschecked 3 days ago$58.00Order
HealthLabs.comchecked 3 days ago$79.00Order
Discounted Labschecked 3 days ago$92.00Order
True Health Labschecked 21 days ago$99.00Order

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.

Magnesium, RBC: common questions

How much does a Magnesium, RBC test cost without insurance?

The lowest self-pay price we track for Magnesium, RBC is $3.03 at Mito Health, across 18 ordering services; the highest is $99.00. You pay the ordering service directly, and no insurance is involved. Prices were last verified on September 28, 2026.

Do you need a doctor's order for a Magnesium, RBC test?

No. Every ordering service listed on this page includes the physician order with the purchase, so you can buy Magnesium, RBC yourself and take the requisition to the lab. Your results come back to you — what they mean is a conversation for you and a clinician.

Where is the blood drawn for a Magnesium, RBC test?

At a Quest Diagnostics or LabCorp patient service center, depending on which laboratory the ordering service you pick uses. You choose the location and time after you order. LabTestCompare does not draw blood, run tests, or issue results — we only compare what each service charges.

Can you use health insurance for a Magnesium, RBC test?

No. Every price on this page is a self-pay price paid directly to the ordering service, and none of these services bill insurance. If you want Magnesium, RBC billed through your plan instead, that goes through your own provider — which is a separate route with its own cost, and worth comparing against the prices here.

Is this the same Magnesium, RBC test a doctor would order?

Yes — it is the same assay, identified by the same laboratory order codes: Quest #623 and LabCorp #080283. Every price on this page is matched to that code, which is how we can say the services are being compared on an identical test rather than on similarly named products.

How long do Magnesium, RBC results take?

That is set by the laboratory rather than by us. Routine blood tests are commonly back within a few business days and specialized assays take longer; the ordering service states the expected turnaround for Magnesium, RBC before you buy, and delivers the result to you directly.

Compiled by the LabTestCompare editorial team. Prices are collected from each ordering service’s own published catalog and re-checked on a schedule — see our editorial policy for how we source and correct them. Prices on this page were last verified .

Background reading on lab testing: MedlinePlus: Lab Tests (NIH) · CDC. This page is a price comparison, not medical advice — see our medical disclaimer.