Magnesium test cost in Detroit, MI
In Detroit-Warren-Dearborn, MI, 26 hospitals list a cash price for magnesium blood test: from $6.34 to $133.50, with a median of $9.25. The lowest listed price is at Henry Ford Health — $2.91 less than the median here. Across Michigan, the median is $23.35 at 60 hospitals.
Cash prices at 26 facilities across 19 cities for code 83735, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Dec 31, 2025 and Sep 2, 2026.
Lowest$6.34Henry Ford Health
Median$9.25half pay less
Highest$133.50in this market
Difference21.1×highest vs lowest
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Detroit-Warren-Dearborn, MI.
median
Lowest $6.34Highest $133.50
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Henry Ford Health lowest Rochester, MI · (248) 652-5000 RL MAGNESIUM RBCS | $6.34 | $13.48 | $7.96–$8.65 | 53% | — source file |
| Henry Ford Health Rochester, MI · (248) 652-5000 MAGNESIUM-SERUM -SJH | $6.58 | $14.00 | $7.96–$8.65 | 53% | — source file |
| Henry Ford Health Rochester, MI · (248) 652-5000 MAGNESIUM | $6.58 | $14.00 | $7.96–$8.65 | 53% | — source file |
| Henry Ford Health Rochester, MI · (248) 652-5000 MAGNESIUM LEVEL 24 HOUR URINE | $6.58 | $14.00 | $7.96–$8.65 | 53% | — source file |
| Henry Ford Health Rochester, MI · (248) 652-5000 MAGNESIUM LEVEL URINE | $6.58 | $14.00 | $7.96–$8.65 | 53% | — source file |
| Henry Ford Health Rochester, MI · (248) 652-5000 RL /SSAT24/MAGNESIUM | $7.42 | $15.79 | $7.96–$8.65 | 53% | — source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 MAGNESIUM, RBC | $7.55 | $13.48 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 MAGNESIUM, RBC | $7.55 | $13.48 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 MAGNESIUM, RBC | $7.55 | $13.48 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 MAGNESIUM, RBC | $7.55 | $13.48 | $9.14–$10.75 | 44% | — source file |
| Karmanos Cancer Center Detroit, MI · (800) 576-6266 MAGNESIUM RBC | $7.80 | $15.60 | $3.66–$11.70 | 50% | Dec 31, 2025 source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 MAGNESIUM, RBC-LC | $7.84 | $14.00 | $5.46–$10.75 | 44% | — source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 K STONE, MAGNESIUM, UR-LC | $7.84 | $14.00 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 K STONE, MAGNESIUM, UR-LC | $7.84 | $14.00 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 K STONE, MAGNESIUM, UR-LC | $7.84 | $14.00 | $5.46–$10.75 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 MAGNESIUM, RBC-LC | $7.84 | $14.00 | $5.46–$10.75 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 K STONE, MAGNESIUM, UR-LC | $7.84 | $14.00 | $5.46–$10.75 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 K STONE, MAGNESIUM, UR-LC | $8.40 | $15.00 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 K STONE, MAGNESIUM, UR-LC | $8.40 | $15.00 | $9.14–$10.75 | 44% | — source file |
| William Beaumont Hospital Grosse Pointe, MI · (313) 473-1000 Hc Magnesium Rbc Qstval | $8.83 | $8.83 | — | — | — source file |
| William Beaumont Hospital Troy, MI · (248) 964-8800 Hc Magnesium Rbc Qstval | $8.83 | $8.83 | — | — | — source file |
| Beaumont Hospital - Taylor Taylor, MI · (313) 295-5000 Hc Magnesium Rbc Qstval | $8.83 | $8.83 | — | — | — source file |
| Corewell Health Wayne Hospital Wayne, MI · (734) 467-4175 Hc Magnesium Rbc Qstval | $8.83 | $8.83 | — | — | — source file |
| Corewell Health Trenton Hospital Trenton, MI · (734) 671-3800 Hc Magnesium Rbc Qstval | $8.83 | $8.83 | — | — | — source file |
| Henry Ford Macomb Hospital Clinton Twp, MI · (586) 263-2300 HB LAB MAGNESIUM | $9.25 | $46.00 | $3.50–$33.21 | 80% | Jun 28, 2026 source file |
| Henry Ford Health Hospital Detroit, MI · (313) 916-2600 HB LAB MAGNESIUM | $9.25 | $46.00 | $3.50–$23.56 | 80% | Jun 28, 2026 source file |
| Henry Ford Health West Bloomfield Hospital West Bloomfield, MI · (248) 325-1000 HB LAB MAGNESIUM, RBC, SO | $9.25 | $7.95 | $3.50–$19.96 | -16% | Jun 28, 2026 source file |
| Henry Ford Health West Bloomfield Hospital West Bloomfield, MI · (248) 325-1000 HB LAB MAGNESIUM | $9.25 | $46.00 | $3.50–$23.56 | 80% | Jun 28, 2026 source file |
| Henry Ford Health Hospital Detroit, MI · (313) 916-2600 HB LAB MAGNESIUM, RBC, SO | $9.25 | $7.95 | $5.46–$7.95 | -16% | Jun 28, 2026 source file |
| Henry Ford Wyandotte Hospital Wyandotte, MI HB LAB MAGNESIUM | $9.25 | $46.00 | $3.50–$23.56 | 80% | Jun 28, 2026 source file |
| Henry Ford Wyandotte Hospital Wyandotte, MI HB LAB MAGNESIUM, RBC, SO | $9.25 | $7.95 | $5.46–$7.95 | -16% | Jun 28, 2026 source file |
| Henry Ford Macomb Hospital Clinton Twp, MI · (586) 263-2300 HB LAB MAGNESIUM, RBC, SO | $9.25 | $7.95 | $3.50–$15.75 | -16% | Jun 28, 2026 source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 MAGNESIUM-SERUM | $10.63 | $18.98 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 MAGNESIUM-URINE | $10.63 | $18.98 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 MAGNESIUM-SERUM | $10.63 | $18.98 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 MAGNESIUM-URINE | $10.63 | $18.98 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 MAGNESIUM-URINE | $10.64 | $19.00 | $5.46–$10.75 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 MAGNESIUM-SERUM | $10.64 | $19.00 | $5.46–$10.75 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 MAGNESIUM-SERUM | $10.64 | $19.00 | $5.46–$10.75 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 MAGNESIUM-URINE | $10.64 | $19.00 | $5.46–$10.75 | 44% | — source file |
| William Beaumont Hospital Grosse Pointe, MI · (313) 473-1000 Hc 0020699 Assay Of Magnesium Fecal Arup | $11.37 | $11.37 | — | — | — source file |
| Beaumont Hospital - Taylor Taylor, MI · (313) 295-5000 Hc 0020699 Assay Of Magnesium Fecal Arup | $11.37 | $11.37 | — | — | — source file |
| Corewell Health Wayne Hospital Wayne, MI · (734) 467-4175 Hc 0020699 Assay Of Magnesium Fecal Arup | $11.37 | $11.37 | — | — | — source file |
| William Beaumont Hospital Troy, MI · (248) 964-8800 Hc 0020699 Assay Of Magnesium Fecal Arup | $11.37 | $11.37 | — | — | — source file |
| Corewell Health Trenton Hospital Trenton, MI · (734) 671-3800 Hc 0020699 Assay Of Magnesium Fecal Arup | $11.37 | $11.37 | — | — | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 MAGNESIUM-URINE | $11.76 | $21.00 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 MAGNESIUM-SERUM | $11.76 | $21.00 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 MAGNESIUM-SERUM | $11.76 | $21.00 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 MAGNESIUM-URINE | $11.76 | $21.00 | $9.14–$10.75 | 44% | — source file |
| Henry Ford Health Southfield, MI · (248) 849-3000 MAGNESIUM SERUM | $12.32 | $22.00 | $4.88–$12.04 | 44% | — source file |
| Henry Ford Health Novi, MI MAGNESIUM URINE 24 HR | $12.32 | $22.00 | $4.88–$12.04 | 44% | — source file |
| Henry Ford Health Novi, MI MAGNESIUM SERUM | $12.32 | $22.00 | $4.88–$12.04 | 44% | — source file |
| Henry Ford Health Novi, MI MAGNESIUM URINE 24 HR | $12.32 | $22.00 | $4.88–$12.04 | 44% | — source file |
| Henry Ford Health Novi, MI MAGNESIUM SERUM | $12.32 | $22.00 | $4.88–$12.04 | 44% | — source file |
| Henry Ford Health Southfield, MI · (248) 849-3000 MAGNESIUM URINE 24 HR | $12.32 | $22.00 | $4.88–$12.04 | 44% | — source file |
| Henry Ford Health Southfield, MI · (248) 849-3000 MAGNESIUM URINE 24 HR | $12.32 | $22.00 | $4.88–$12.04 | 44% | — source file |
| Henry Ford Health Southfield, MI · (248) 849-3000 MAGNESIUM SERUM | $12.32 | $22.00 | $4.88–$12.04 | 44% | — source file |
| McLaren Oakland Pontiac, MI · (248) 338-5000 Magnesium Urine | $16.35 | $32.70 | $3.66–$18.22 | 50% | Dec 31, 2025 source file |
| McLaren Oakland Pontiac, MI · (248) 338-5000 Magnesium 24 Hr Urine | $16.35 | $32.70 | $3.66–$18.22 | 50% | Dec 31, 2025 source file |
| McLaren Oakland Pontiac, MI · (248) 338-5000 Magnesium Level | $16.35 | $32.70 | $3.66–$25.25 | 50% | Dec 31, 2025 source file |
| Karmanos Cancer Center Detroit, MI · (800) 576-6266 MAGNESIUM, URINE | $18.10 | $36.20 | $3.66–$27.15 | 50% | Dec 31, 2025 source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 MAGNESIUM | $19.04 | $34.00 | $5.46–$10.75 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 MAGNESIUM | $19.04 | $34.00 | $5.46–$10.75 | 44% | — source file |
| McLaren Port Huron Port Huron, MI · (810) 987-5000 ASSAY OF MAGNESIUM | $22.70 | $45.40 | $3.66–$23.06 | 50% | Dec 31, 2025 source file |
| McLaren Port Huron Port Huron, MI · (810) 987-5000 Magnesium Urine | $23.50 | $47.00 | $3.66–$23.88 | 50% | Dec 31, 2025 source file |
| McLaren Port Huron Port Huron, MI · (810) 987-5000 Magnesium Level | $23.50 | $47.00 | $3.66–$35.25 | 50% | Dec 31, 2025 source file |
| McLaren Port Huron Port Huron, MI · (810) 987-5000 Magnesium 24 Hr Urine | $23.50 | $47.00 | $3.66–$23.88 | 50% | Dec 31, 2025 source file |
| Henry Ford Health Southfield, MI · (248) 849-3000 REF-MAGNESIUM RBC | $26.32 | $47.00 | $4.52–$12.04 | 44% | — source file |
| Henry Ford Health Novi, MI REF-MAGNESIUM RBC | $26.32 | $47.00 | $4.52–$12.04 | 44% | — source file |
| Henry Ford Health Southfield, MI · (248) 849-3000 REF-MAGNESIUM RBC | $26.32 | $47.00 | $4.52–$12.04 | 44% | — source file |
| Henry Ford Health Novi, MI REF-MAGNESIUM RBC | $26.32 | $47.00 | $4.52–$12.04 | 44% | — source file |
| McLaren Macomb Mount Clemens, MI · (586) 493-8000 Magnesium 24 Hr Urine | $28.80 | $57.60 | $3.66–$20.69 | 50% | Dec 31, 2025 source file |
| McLaren Macomb Mount Clemens, MI · (586) 493-8000 Magnesium Level | $28.80 | $57.60 | $3.66–$35.57 | 50% | Dec 31, 2025 source file |
| McLaren Macomb Mount Clemens, MI · (586) 493-8000 Magnesium Urine | $28.80 | $57.60 | $3.66–$20.69 | 50% | Dec 31, 2025 source file |
| VHS Sinai Grace Hospital Detroit, MI · (313) 966-3300 MAGNESIUM | $34.50 | $46.00 | — | 25% | Apr 8, 2026 source file |
| McLaren Lapeer Region Lapeer, MI · (810) 667-5500 Magnesium Level | $36.30 | $72.60 | $3.66–$38.04 | 50% | Dec 31, 2025 source file |
| McLaren Lapeer Region Lapeer, MI · (810) 667-5500 Magnesium 24 Hr Urine | $36.30 | $72.60 | $3.66–$13.02 | 50% | Dec 31, 2025 source file |
| McLaren Lapeer Region Lapeer, MI · (810) 667-5500 Magnesium Urine | $36.30 | $72.60 | $3.66–$13.02 | 50% | Dec 31, 2025 source file |
| Karmanos Cancer Center Detroit, MI · (800) 576-6266 MAGNESIUM | $38.95 | $77.90 | $3.66–$58.43 | 50% | Dec 31, 2025 source file |
| Harper University Hospital Detroit, MI · (313) 745-6211 MAGNESIUM, URINE | $46.50 | $62.00 | $1.00–$9.14 | 25% | Aug 20, 2026 source file |
| Harper University Hospital Detroit, MI · (313) 745-6211 MAGNESIUM, URINE | $46.50 | $62.00 | $1.00–$9.14 | 25% | Sep 2, 2026 source file |
| Corewell Health Trenton Hospital Trenton, MI · (734) 671-3800 Hc Assay Of Magnesium | $57.00 | $57.00 | — | — | — source file |
| William Beaumont Hospital Troy, MI · (248) 964-8800 Hc Assay Of Magnesium | $57.00 | $57.00 | — | — | — source file |
| Beaumont Hospital - Taylor Taylor, MI · (313) 295-5000 Hc Assay Of Magnesium | $57.00 | $57.00 | — | — | — source file |
| William Beaumont Hospital Grosse Pointe, MI · (313) 473-1000 Hc Assay Of Magnesium | $57.00 | $57.00 | — | — | — source file |
| Corewell Health Wayne Hospital Wayne, MI · (734) 467-4175 Hc Assay Of Magnesium | $57.00 | $57.00 | — | — | — source file |
| VHS Childrens Hospital of Michigan Detroit, MI · (313) 745-5437 MAGNESIUM | $64.50 | $86.00 | — | 25% | Apr 6, 2026 source file |
| VHS Rehabilitation Institute of Michigan Detroit, MI MAGNESIUM | $101.25 | $135.00 | — | 25% | Apr 8, 2026 source file |
| VHS Huron Valley-Sinai Hospital Commerce Charter Twp, MI · (248) 937-3370 MAGNESIUM | $105.00 | $140.00 | $1.00–$9.14 | 25% | May 20, 2026 source file |
| Harper University Hospital Detroit, MI · (313) 745-6211 MAGNESIUM | $126.00 | $168.00 | $1.00–$9.14 | 25% | Sep 2, 2026 source file |
| Harper University Hospital Detroit, MI · (313) 745-6211 MAGNESIUM | $126.00 | $168.00 | $1.00–$9.14 | 25% | Aug 20, 2026 source file |
| VHS Detroit Receiving Hospital Detroit, MI · (313) 745-2941 MAGNESIUM | $133.50 | $178.00 | — | 25% | Apr 7, 2026 source file |
Outpatient: lowest $6.34, median $9.25, highest $133.50 — a 21.1× difference within the same market.
As an inpatient, the same code is billed by 14 facilities here, median $8.83. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At 12 of 17 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 3 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.
7 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 83735 ($43.50). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| VHS Detroit Receiving Hospital Detroit, MIMAGNESIUM/3 | $2.45 | file |
| VHS Huron Valley-Sinai Hospital Commerce Charter Twp, MIMAGNESIUM/3 | $2.45 | file |
| VHS Sinai Grace Hospital Detroit, MIMAGNESIUM/3 | $2.45 | file |
| Harper University Hospital Detroit, MIMAGNESIUM/3 | $2.45 | file |
| Harper University Hospital Detroit, MIMAGNESIUM/3 | $2.45 | file |
| VHS Childrens Hospital of Michigan Detroit, MIMAGNESIUM/3 | $2.45 | file |
| VHS Rehabilitation Institute of Michigan Detroit, MIMAGNESIUM/3 | $2.45 | file |