Magnesium test cost in Davenport, IA
In Davenport-Moline-Rock Island, IA-IL, 6 hospitals list a cash price for magnesium blood test: from $16.80 to $48.60, with a median of $33.00. The lowest listed price is at Trinity Medical Center and 1 other hospital — $16.20 less than the median here. Across Iowa, the median is $43.80 at 37 hospitals.
Cash prices at 6 facilities across 5 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 Jan 28, 2026 and Mar 31, 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 Davenport-Moline-Rock Island, IA-IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Trinity Medical Center lowest Bettendorf, IA · (563) 742-5000 ASSAY OF MAGNESIUM | $16.80 | $21.00 | $4.02–$12.74 | 20% | Jan 28, 2026 source file |
| Trinity Medical Center lowest Rock Island, IL · (309) 779-5000 ASSAY OF MAGNESIUM | $16.80 | $21.00 | $4.02–$12.74 | 20% | Jan 28, 2026 source file |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 Magnesium Urine - Sendout | $22.20 | $37.00 | $7.71–$11.98 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 Magnesium, 24-Hour Urine (W/O Creatinine) - Quest | $24.00 | $40.00 | $7.71–$11.98 | 40% | Mar 31, 2026 source file |
| Trinity Medical Center Bettendorf, IA · (563) 742-5000 HC MAGNESIUM | $33.57 | $41.96 | $6.70–$22.11 | 20% | Jan 28, 2026 source file |
| Trinity Medical Center Rock Island, IL · (309) 779-5000 HC MAGNESIUM | $33.57 | $41.96 | $6.30–$22.11 | 20% | Jan 28, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA GHS MAGNESIUM,RBC | $43.80 | $73.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA Magnesium Urine - Sendout | $43.80 | $73.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA Magnesium, 24-Hour Urine (W/O Creatinine) - Quest | $43.80 | $73.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA GHS MAGNESIUM (LABOR ONLY) | $43.80 | $73.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 GHS MAGNESIUM (LABOR ONLY) | $48.60 | $81.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 Magnesium, 24-Hour Urine (W/O Creatinine) - Quest | $48.60 | $81.00 | $25.92–$74.52 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 Magnesium Urine - Sendout | $48.60 | $81.00 | $25.92–$74.52 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 Magnesium Urine - Sendout | $48.60 | $81.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 Magnesium, 24-Hour Urine (W/O Creatinine) - Quest | $48.60 | $81.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 GHS MAGNESIUM,RBC | $48.60 | $81.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA Magnesium Level | $58.20 | $97.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA MAGNESIUM | $58.20 | $97.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA GHS MAGNESIUM | $58.20 | $97.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA Magnesium Level - OB | $58.20 | $97.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 Magnesium Level | $61.20 | $102.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 GHS MAGNESIUM | $61.20 | $102.00 | $7.71–$11.98 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 GHS MAGNESIUM | $61.20 | $102.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 MAGNESIUM | $61.20 | $102.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 Magnesium Level - OB | $61.20 | $102.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA GHS MAGNESIUM, 24HR URINE | $61.20 | $102.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 GHS MAGNESIUM | $61.20 | $102.00 | $32.64–$93.84 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 MAGNESIUM | $61.20 | $102.00 | $32.64–$93.84 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 Magnesium Level - OB | $61.20 | $102.00 | $32.64–$93.84 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 Magnesium Level | $61.20 | $102.00 | $7.71–$11.98 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 Magnesium Level | $61.20 | $102.00 | $32.64–$93.84 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 Magnesium Level - OB | $61.20 | $102.00 | $7.71–$11.98 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 MAGNESIUM | $61.20 | $102.00 | $7.71–$11.98 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 GHS MAGNESIUM, 24HR URINE | $64.80 | $108.00 | $34.56–$99.36 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 GHS MAGNESIUM, 24HR URINE | $64.80 | $108.00 | — | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 GHS MAGNESIUM, 24HR URINE | $64.80 | $108.00 | $7.71–$11.98 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport West Medical Center Davenport, IA GHS MAGNESIUM, RBC & PLASMA | $87.00 | $145.00 | $6.70 | 40% | Mar 31, 2026 source file |
| MercyOne Genesis Davenport Medical Center Davenport, IA · (563) 421-1000 GHS MAGNESIUM, RBC & PLASMA | $91.80 | $153.00 | — | 40% | Mar 31, 2026 source file |
Outpatient: lowest $16.80, median $33.00, highest $48.60 — a 2.9× difference within the same market.
As an inpatient, the same code is billed by 4 facilities here, median $19.50. 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 1 of 5 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it 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.