Magnesium test cost in Milwaukee, WI — inpatient
In Milwaukee-Waukesha, WI, 13 hospitals list a cash price for Magnesium blood test as an inpatient: from $13.34 to $57.77, with a median of $50.00. The lowest listed price is at Children's Hospital of Wisconsin — $36.66 less than the median here. Across Wisconsin, the median is $50.00 at 80 hospitals.
Cash prices at 13 facilities across 10 cities for code 83735, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Nov 21, 2025 and Mar 23, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Milwaukee-Waukesha, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Children's Hospital of Wisconsin lowest Milwaukee, WI HBC MAGNESIUM KIDSTN | $13.34 | $24.25 | $16.98–$23.04 | 45% | Mar 23, 2026 source file |
| Children's Hospital of Wisconsin lowest Milwaukee, WI HBC MAGNESIUM KIDSTN | $13.34 | $24.25 | $16.98–$23.04 | 45% | Mar 23, 2026 source file |
| Columbia St. Mary's, Inc. Glendale, WI MAGNESIUM | $37.63 | $71.00 | $6.50–$16.35 | 47% | — source file |
| Aurora Sinai Medical Center of Aurora Health Care Metro Inc Milwaukee, WI MAGNESIUM SRDP | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Sinai Medical Center of Aurora Health Care Metro Inc Milwaukee, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Grafton Grafton, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora West Allis Medical Center West Allis, WI MAGNESIUM SRDP | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Grafton Grafton, WI MAGNESIUM SRDP | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Kenosha Kenosha, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Psychiatric Hospital Wauwatosa, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes Medical Center of Aurora Health Care Metro Inc Milwaukee, WI MAGNESIUM SRDP | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora West Allis Medical Center West Allis, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes Medical Center of Aurora Health Care Metro Inc Milwaukee, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes South Shore of Aurora Health Care Metro Inc Cudahy, WI MAGNESIUM SRDP | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Summit Summit, WI MAGNESIUM SRDP | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Summit Summit, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes South Shore of Aurora Health Care Metro Inc Cudahy, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Washington County Hartford, WI MAGNESIUM SRDP | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Washington County Hartford, WI MAGNESIUM URINE | $50.00 | $100.00 | $60.00–$85.00 | 50% | Nov 21, 2025 source file |
| Columbia St. Mary's Hospital Ozaukee, Inc. Mequon, WI HC ASSAY OF MAGNESIUM | $57.77 | $109.00 | $7.04–$30.55 | 47% | — source file |
| Columbia St. Mary's Hospital Milwaukee, Inc. Milwaukee, WI HC ASSAY OF MAGNESIUM | $57.77 | $109.00 | $7.04–$30.55 | 47% | — source file |
| Aurora West Allis Medical Center West Allis, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Grafton Grafton, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Summit Summit, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Washington County Hartford, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Kenosha Kenosha, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora Psychiatric Hospital Wauwatosa, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora Sinai Medical Center of Aurora Health Care Metro Inc Milwaukee, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes Medical Center of Aurora Health Care Metro Inc Milwaukee, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes South Shore of Aurora Health Care Metro Inc Cudahy, WI MAGNESIUM SERUM | $65.00 | $130.00 | $78.00–$110.50 | 50% | Nov 21, 2025 source file |
| Children's Hospital of Wisconsin Milwaukee, WI HBC MAGNESIUM BLOOD | $70.81 | $128.75 | $90.13–$122.31 | 45% | Mar 23, 2026 source file |
| Children's Hospital of Wisconsin Milwaukee, WI HBC MAGNESIUM BLOOD | $70.81 | $128.75 | $90.13–$122.31 | 45% | Mar 23, 2026 source file |
| Aurora Medical Center Kenosha Kenosha, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Washington County Hartford, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Summit Summit, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes South Shore of Aurora Health Care Metro Inc Cudahy, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Grafton Grafton, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
| Aurora Sinai Medical Center of Aurora Health Care Metro Inc Milwaukee, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
| Aurora West Allis Medical Center West Allis, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
| Aurora Psychiatric Hospital Wauwatosa, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes Medical Center of Aurora Health Care Metro Inc Milwaukee, WI MAGNESIUM, RBC'S | $75.00 | $150.00 | $90.00–$127.50 | 50% | Nov 21, 2025 source file |
Inpatient: lowest $13.34, median $50.00, highest $57.77 — a 4.3× difference within the same market.
As an outpatient, the same code is billed by 17 facilities here, median $50.00 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 10 of 13 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 10 it is below every plan's rate. 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.