Magnesium test cost in Freeport, IL
In Freeport, IL, 1 hospital lists a cash price for magnesium blood test: from $94.61 to $94.61, with a median of $94.61. Across Illinois, the median is $71.50 at 104 hospitals.
Cash prices at 1 facility for code 83735, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 29, 2026; the hospital files themselves were last updated between Jan 22, 2026 and Jan 22, 2026.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| FHN Memorial Hospital Freeport, IL · (815) 599-6000 Magnesium level | $94.61 | $118.26 | $3.80–$118.26 | 20% | Jan 22, 2026 source file |
Outpatient: lowest $94.61, median $94.61, highest $94.61.
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.