Magnesium test cost in Grand Rapids, MI — inpatient
In Grand Rapids-Wyoming-Kentwood, MI, 5 hospitals list a cash price for Magnesium blood test as an inpatient: from $6.00 to $27.00, with a median of $20.00. The lowest listed price is at Mary Free Bed Rehabilitation Hospital — $14.00 less than the median here. Across Michigan, the median is $23.35 at 60 hospitals.
Cash prices at 5 facilities across 4 cities for code 83735, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between — and —.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Grand Rapids-Wyoming-Kentwood, MI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Mary Free Bed Rehabilitation Hospital lowest Grand Rapids, MI HCHG MAGNESIUM RBC | $6.00 | $6.00 | $3.79–$5.74 | — | — source file |
| Corewell Health Zeeland Community Hospital Zeeland, MI Hc Assay Of Magnesium | $20.00 | $20.00 | — | — | — source file |
| Corewell Health Greenville Hospital Greenville, MI Hc Assay Of Magnesium | $20.00 | $20.00 | — | — | — source file |
| Corewell Health Butterworth Hospital Grand Rapids, MI Hc Assay Of Magnesium | $27.00 | $27.00 | — | — | — source file |
| Corewell Health Blodgett Hospital East Grand Rapids, MI Hc Assay Of Magnesium | $27.00 | $27.00 | — | — | — source file |
| Corewell Health Butterworth Hospital Grand Rapids, MI Hc Assay Of Magnesium | $27.00 | $27.00 | — | — | — source file |
| Mary Free Bed Rehabilitation Hospital Grand Rapids, MI HCHG MAGNESIUM | $47.00 | $47.00 | $29.68–$44.98 | — | — source file |
| Mary Free Bed Rehabilitation Hospital Grand Rapids, MI HCHG MAGNESIUM RANDOM URINE | $52.00 | $52.00 | $32.84–$49.76 | — | — source file |
| Mary Free Bed Rehabilitation Hospital Grand Rapids, MI HCHG MAGNESIUM 24 HR/UR | $52.00 | $52.00 | $32.84–$49.76 | — | — source file |
| Mary Free Bed Rehabilitation Hospital Grand Rapids, MI HCHG MAGNESIUM URINE | $52.00 | $52.00 | $32.84–$49.76 | — | — source file |
Inpatient: lowest $6.00, median $20.00, highest $27.00 — a 4.5× difference within the same market.
As an outpatient, the same code is billed by 4 facilities here, median $23.50 — that is the price to compare if you are not being admitted.
Cash or insurance?
At the one hospital here that publishes insurer rates for this code, the cash price is not below the highest rate a health plan has negotiated. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
What it is
A magnesium test measures the level of magnesium in the blood. Doctors order it for muscle cramps or weakness, an irregular heartbeat, low potassium or calcium that does not correct, and for people on diuretics, long-term acid-reducing drugs or with kidney disease.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.