Magnesium test cost in Charlotte, NC — inpatient
In Charlotte-Concord-Gastonia, NC-SC, 16 hospitals list a cash price for magnesium blood test as an inpatient: from $19.00 to $127.00, with a median of $73.00. The lowest listed price is at MUSC Lancaster Medical Center — $54.00 less than the median here. Across North Carolina, the median is $58.00 at 37 hospitals.
Cash prices at 16 facilities across 13 cities for code 83735, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Dec 1, 2025 and Sep 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 Charlotte-Concord-Gastonia, NC-SC.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| MUSC Lancaster Medical Center lowest Lancaster, SC HB MAGRU MAG URINE (SEND OUT) | $19.00 | $38.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Chester Regional Medical Center Chester, SC HB MAGRU MAG URINE (SEND OUT) | $19.50 | $39.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Lancaster Medical Center Lancaster, SC HB MAG/CREAT U (SEND OUT) | $21.50 | $43.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Lancaster Medical Center Lancaster, SC HB MAGNESIUM URINE 24 HOUR (SEND OUT) | $21.50 | $43.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Chester Regional Medical Center Chester, SC HB MAG/CREAT U (SEND OUT) | $22.50 | $45.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Lancaster Medical Center Lancaster, SC HB EFPO MAGNESIUM MA (SEND OUT) | $29.50 | $59.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Chester Regional Medical Center Chester, SC HB EFPO MAGNESIUM MA (SEND OUT) | $32.00 | $64.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Lancaster Medical Center Lancaster, SC HB MAGNESIUM URINE (SEND OUT) | $34.00 | $68.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Chester Regional Medical Center Chester, SC HB MAGNESIUM URINE (SEND OUT) | $35.00 | $70.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Chester Regional Medical Center Chester, SC HB MAGNESIUM | $35.00 | $70.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Chester Regional Medical Center Chester, SC HB MAGNESIUM URINE 24 HOUR (SEND OUT) | $35.00 | $70.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Chester Regional Medical Center Chester, SC HB MAGNESIUM STONE (SEND OUT) | $45.00 | $90.00 | — | 50% | Apr 1, 2026 source file |
| Amisub of South Carolina, Inc. Rock Hill, SC MAGNESIUM/2 | $66.75 | $89.00 | $1.00–$96.13 | 25% | Sep 1, 2026 source file |
| Amisub of South Carolina, Inc. Fort Mill, SC MAGNESIUM/2 | $66.75 | $89.00 | $1.00–$96.13 | 25% | Apr 15, 2026 source file |
| Carolinas Medical Center Charlotte, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $44.24–$131.40 | 50% | Dec 5, 2025 source file |
| Carolinas Rehabilitation Charlotte, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $48.91–$134.32 | 50% | Dec 5, 2025 source file |
| Carolinas Rehabilitation Belmont, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $48.91–$134.32 | 50% | Dec 5, 2025 source file |
| Atrium Health Hospitals Inc Wadesboro, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $44.24–$138.70 | 50% | Dec 1, 2025 source file |
| The Charlotte Mecklenburg Hospital Authority Concord, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $44.24–$138.70 | 50% | Dec 1, 2025 source file |
| Atrium Health Hospitals Inc Lincolnton, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $41.86–$138.70 | 50% | Dec 1, 2025 source file |
| The Charlotte Mecklenburg Hospital Authority Monroe, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $44.24–$138.70 | 50% | Dec 4, 2025 source file |
| The Charlotte Mecklenburg Hospital Authority Charlotte, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $44.24–$134.32 | 50% | Dec 5, 2025 source file |
| The Charlotte Mecklenburg Hospital Authority Charlotte, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $44.24–$134.32 | 50% | Dec 5, 2025 source file |
| Carolinas Medical Center Charlotte, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $44.24–$131.40 | 50% | Dec 4, 2025 source file |
| Carolinas Medical Center Charlotte, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $44.24–$134.32 | 50% | Dec 4, 2025 source file |
| Carolinas Medical Center Charlotte, NC HC ASSAY OF MAGNESIUM | $73.00 | $146.00 | $45.26–$128.48 | 50% | Dec 4, 2025 source file |
| DUKE HEALTH LAKE NORMAN REGIONAL MEDICAL CENTER, INC. Doing Business As: DUKE HEALTH LAKE NORMAN HOSPITAL Mooresville, NC Magnesium Pnl | $100.98 | $374.00 | $108.83–$129.03 | 73% | — source file |
| DUKE HEALTH LAKE NORMAN REGIONAL MEDICAL CENTER, INC. Doing Business As: DUKE HEALTH LAKE NORMAN HOSPITAL Mooresville, NC Magnesium | $100.98 | $374.00 | $108.83–$129.03 | 73% | — source file |
| DUKE HEALTH LAKE NORMAN REGIONAL MEDICAL CENTER, INC. Doing Business As: DUKE HEALTH LAKE NORMAN HOSPITAL Mooresville, NC Magnesium | $100.98 | $374.00 | $108.83–$129.03 | 73% | — source file |
| DUKE HEALTH LAKE NORMAN REGIONAL MEDICAL CENTER, INC. Doing Business As: DUKE HEALTH LAKE NORMAN HOSPITAL Mooresville, NC Magnesium Pnl | $100.98 | $374.00 | $108.83–$129.03 | 73% | — source file |
| MUSC Chester Regional Medical Center Chester, SC HB MAGNESIUM URINE 24 HR | $107.00 | $214.00 | — | 50% | Apr 1, 2026 source file |
| Gaston Memorial Hospital Gastonia, NC CHG MAGNESIUM | $127.00 | $127.00 | $100.58–$120.65 | — | May 11, 2026 source file |
| Gaston Memorial Hospital Mount Holly, NC CHG MAGNESIUM | $127.00 | $127.00 | — | — | May 11, 2026 source file |
| Gaston Memorial Hospital Belmont, NC CHG MAGNESIUM | $127.00 | $127.00 | $100.58–$120.65 | — | May 11, 2026 source file |
| Amisub of South Carolina, Inc. Rock Hill, SC MAGNESIUM/4 | $233.25 | $311.00 | $1.00–$311.00 | 25% | Sep 1, 2026 source file |
| Amisub of South Carolina, Inc. Fort Mill, SC MAGNESIUM/4 | $233.25 | $311.00 | $1.00–$311.00 | 25% | Apr 15, 2026 source file |
| Amisub of South Carolina, Inc. Fort Mill, SC MAGNESIUM | $237.75 | $317.00 | $1.00–$317.00 | 25% | Apr 15, 2026 source file |
| Amisub of South Carolina, Inc. Rock Hill, SC MAGNESIUM | $237.75 | $317.00 | $1.00–$317.00 | 25% | Sep 1, 2026 source file |
| MUSC Lancaster Medical Center Lancaster, SC HB MAGNESIUM URINE 24 HR | $302.50 | $605.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Lancaster Medical Center Lancaster, SC HB MAGNESIUM STONE (SEND OUT) | $302.50 | $605.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Lancaster Medical Center Lancaster, SC HB MAGNESIUM | $302.50 | $605.00 | — | 50% | Apr 1, 2026 source file |
Inpatient: lowest $19.00, median $73.00, highest $127.00 — a 6.7× difference within the same market.
As an outpatient, the same code is billed by 16 facilities here, median $73.00 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 11 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 1 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.