Magnesium test cost in Fond du Lac, WI
In Fond du Lac, WI, 2 hospitals list a cash price for Magnesium blood test: from $34.22 to $50.00, with a median of $42.11. The lowest listed price is at Thedacare Regional Medical Center-Appleton Inc — $7.89 less than the median here. Across Wisconsin, the median is $50.00 at 80 hospitals.
Cash prices at 2 facilities for code 83735, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Nov 21, 2025 and Nov 21, 2025.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Fond du Lac, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Thedacare Regional Medical Center-Appleton Inc lowest Fond Du Lac, WI ASSAY MAGNESIUM | $34.22 | $61.10 | — | 44% | — source file |
| Thedacare Regional Medical Center-Appleton Inc lowest Fond Du Lac, WI MAGNESIUM | $34.22 | $61.10 | — | 44% | — source file |
| Aurora Medical Center Fond du Lac Fond Du Lac, WI MAGNESIUM SRDP | $50.00 | $100.00 | $5.36–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Fond du Lac Fond Du Lac, WI MAGNESIUM URINE | $50.00 | $100.00 | $5.36–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Fond du Lac Fond Du Lac, WI MAGNESIUM SERUM | $65.00 | $130.00 | $5.36–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Fond du Lac Fond Du Lac, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $5.36–$127.50 | 50% | Nov 21, 2025 source file |
Outpatient: lowest $34.22, median $42.11, highest $50.00 — a 1.5× difference within the same market.
As an inpatient, the same code is billed by 1 facility here, median $50.00. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At the one hospital here that publishes insurer rates for this code, the cash price is 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.