Magnesium test cost in Charleston, SC — inpatient
In Charleston-North Charleston, SC, 5 hospitals list a cash price for magnesium blood test as an inpatient: from $21.50 to $37.70, with a median of $37.70. The lowest listed price is at MUSC Medical Center — $16.20 less than the median here. Across South Carolina, the median is $21.50 at 19 hospitals.
Cash prices at 5 facilities across 3 cities for code 83735, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 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 Charleston-North Charleston, SC.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| MUSC Medical Center lowest Charleston, SC HB MAG/CREAT U (SEND OUT) | $21.50 | $43.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Medical Center Charleston, SC HB MAGRU MAG URINE (SEND OUT) | $22.00 | $44.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Medical Center Charleston, SC HB EFPO MAGNESIUM MA (SEND OUT) | $30.00 | $60.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Medical Center Charleston, SC HB MAGNESIUM URINE 24 HOUR (SEND OUT) | $33.50 | $67.00 | — | 50% | Apr 1, 2026 source file |
| Bon Secours St Francis Xavier Hospital INC Charleston, SC HC So Magnesium | $37.70 | $58.00 | — | 35% | — source file |
| Roper St Francis Hospital Berkeley INC Summerville, SC HC So Magnesium | $37.70 | $58.00 | — | 35% | — source file |
| Roper Hospital INC Charleston, SC HC So Magnesium | $37.70 | $58.00 | — | 35% | — source file |
| Roper St Francis Mount Pleasant Hospital Mount Pleasant, SC HC So Magnesium | $37.70 | $58.00 | — | 35% | — source file |
| MUSC Medical Center Charleston, SC HB MAGNESIUM URINE (SEND OUT) | $39.00 | $78.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Medical Center Charleston, SC HB MAGNESIUM STONE (SEND OUT) | $42.50 | $85.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Medical Center Charleston, SC HB MAGNESIUM | $57.00 | $114.00 | — | 50% | Apr 1, 2026 source file |
| Roper Hospital INC Charleston, SC HC Assay of Magnesium | $79.30 | $122.00 | — | 35% | — source file |
| Bon Secours St Francis Xavier Hospital INC Charleston, SC HC Assay of Magnesium | $79.30 | $122.00 | — | 35% | — source file |
| Roper St Francis Hospital Berkeley INC Summerville, SC HC Assay of Magnesium | $79.30 | $122.00 | — | 35% | — source file |
| Roper St Francis Mount Pleasant Hospital Mount Pleasant, SC HC Assay of Magnesium | $79.30 | $122.00 | — | 35% | — source file |
Inpatient: lowest $21.50, median $37.70, highest $37.70 — a 1.8× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $37.70 — that is the price to compare if you are not being admitted.
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.