Magnesium test cost in Joplin, MO
In Joplin, MO-KS, 5 hospitals list a cash price for Magnesium blood test: from $24.05 to $103.35, with a median of $65.00. The lowest listed price is at Mercy Hospital Joplin dba Mercy Hospital Joplin — $40.95 less than the median here. Across Missouri, the median is $36.63 at 30 hospitals.
Cash prices at 5 facilities across 4 cities for code 83735, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 25, 2026; the hospital files themselves were last updated between Sep 1, 2026 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 Joplin, MO-KS.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Mercy Hospital Joplin dba Mercy Hospital Joplin lowest Joplin, MO Magnesium | $24.05 | $37.00 | $5.46–$41.17 | 35% | — source file |
| Mercy Hospital Joplin dba Mercy Hospital Joplin Joplin, MO Magnesium RBC | $29.25 | $45.00 | $13.50–$45.00 | 35% | — source file |
| Mercy Hospital Columbus Columbus, KS Magnesium Urine | $52.00 | $80.00 | $5.96–$33.71 | 35% | — source file |
| Mercy Hospital Columbus Columbus, KS Magnesium | $52.00 | $80.00 | $5.96–$33.71 | 35% | — source file |
| Mercy Hospital Carthage Carthage, MO Stone Risk Ua Magnesium | $65.00 | $100.00 | $27.47–$100.00 | 35% | — source file |
| Mercy Hospital Carthage Carthage, MO Magnesium Stool | $65.00 | $100.00 | $27.47–$100.00 | 35% | — source file |
| Mercy Hospital Columbus Columbus, KS Magnesium Stool | $66.95 | $103.00 | $5.96–$33.71 | 35% | — source file |
| Mercy Hospital Carthage Carthage, MO Magnesium Urine | $79.95 | $123.00 | $5.96–$26.63 | 35% | — source file |
| Mercy Hospital Carthage Carthage, MO Magnesium 24 Hr Urine | $83.85 | $129.00 | $5.96–$26.63 | 35% | — source file |
| Mercy Hospital Carthage Carthage, MO Magnesium RBC | $83.85 | $129.00 | $5.96–$26.63 | 35% | — source file |
| Mercy Hospital Columbus Columbus, KS Magnesium 24 Hr Urine | $86.45 | $133.00 | $5.96–$33.71 | 35% | — source file |
| Mercy Hospital Carthage Carthage, MO Magnesium | $87.75 | $135.00 | $5.96–$26.63 | 35% | — source file |
| Freeman Health System - Freeman West Joplin, MO MAGNESIUM | $92.61 | $231.53 | — | 60% | Sep 1, 2026 source file |
| Freeman Health System - Freeman West Joplin, MO MAGNESIUM URINE | $93.66 | $234.15 | — | 60% | Sep 1, 2026 source file |
| Mercy Hospital Joplin dba Mercy Hospital Joplin Joplin, MO Magnesium Stool | $102.70 | $158.00 | $47.40–$158.00 | 35% | — source file |
| Mercy Specialty Hospital Southeast Kansas Galena, KS Magnesium | $103.35 | $159.00 | $5.47–$41.17 | 35% | — source file |
| Mercy Hospital Joplin dba Mercy Hospital Joplin Joplin, MO Magnesium Urine | $104.00 | $160.00 | $5.46–$41.17 | 35% | — source file |
| Mercy Hospital Joplin dba Mercy Hospital Joplin Joplin, MO Stone Risk Ua Magnesium | $104.00 | $160.00 | $5.46–$41.17 | 35% | — source file |
| Mercy Hospital Joplin dba Mercy Hospital Joplin Joplin, MO Magnesium 24 Hr Urine | $104.00 | $160.00 | $48.00–$160.00 | 35% | — source file |
Outpatient: lowest $24.05, median $65.00, highest $103.35 — a 4.3× difference within the same market.
As an inpatient, the same code is billed by 1 facility here, median $92.61. 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 2 of 4 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.