Magnesium test cost in Rapid City, SD — inpatient
In Rapid City, SD, 1 hospital lists a cash price for magnesium blood test as an inpatient: from $24.36 to $24.36, with a median of $24.36. Across South Dakota, the median is $37.60 at 6 hospitals.
Cash prices at 1 facility for code 83735, as an inpatient (admitted to hospital) . Collected Sep 22, 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 Rapid City, SD.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Black Hills Surgical Hospital lowest Rapid City, SD · (605) 721-4700 Magnesium RBC- | $24.36 | $40.60 | $6.57–$36.54 | 40% | — source file |
| Black Hills Surgical Hospital Rapid City, SD · (605) 721-4700 MAGNESIUM- | $35.34 | $58.90 | $6.57–$53.01 | 40% | — source file |
| Black Hills Surgical Hospital Rapid City, SD · (605) 721-4700 MAGNESIUM (Send Out)- | $35.34 | $58.90 | $6.57–$53.01 | 40% | — source file |
Inpatient: lowest $24.36, median $24.36, highest $24.36.
As an outpatient, the same code is billed by 1 facility here, median $24.36 — 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 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.