Magnesium test cost in Kansas City, MO
In Kansas City, MO-KS, 5 hospitals list a cash price for Magnesium blood test: from $4.64 to $185.01, with a median of $37.92. The lowest listed price is at NKC Health — $33.28 less than the median here. Across Missouri, the median is $36.63 at 30 hospitals.
Cash prices at 5 facilities across 3 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 Mar 6, 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 Kansas City, MO-KS.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| NKC Health lowest North Kansas City, MO SR MG URINE | $4.64 | $16.00 | $6.21–$17.75 | 71% | Mar 6, 2026 source file |
| St Joseph Medical Center Kansas City, MO Hc Assay Of Magnesium | $6.00 | $359.13 | $6.03–$359.13 | 98% | Mar 17, 2026 source file |
| NKC Health North Kansas City, MO MAGNESIUM LEVEL | $34.51 | $119.00 | $6.21–$97.34 | 71% | Mar 6, 2026 source file |
| Children's Mercy Hospital Kansas City, MO URINE SAT PANEL MAGNESIUM | $37.92 | $79.00 | $7.04–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas Overland Park, KS MAGNESIUM MAIN | $37.92 | $79.00 | $6.03–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas Overland Park, KS MAGNESIUM URINE | $37.92 | $79.00 | $6.03–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas City, MO MAGNESIUM MAIN | $37.92 | $79.00 | $7.04–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas City, MO MAGNESIUM URINE | $37.92 | $79.00 | $7.04–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas Overland Park, KS URINE SAT PANEL MAGNESIUM | $37.92 | $79.00 | $6.03–$71.10 | 52% | — source file |
| NKC Health North Kansas City, MO MAGNESIUM OTHER | $42.05 | $145.00 | $6.21–$118.61 | 71% | Mar 6, 2026 source file |
| Adventhealth South Overland Park Overland Park, KS HC MAGNESIUM LEVEL | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| Adventhealth South Overland Park Overland Park, KS HC MAGNESIUM URINE RANDOM | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| Adventhealth South Overland Park Overland Park, KS HC MAGNESIUM - SUPERSATURATION PROFILE, URINE - ARUP | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| Adventhealth South Overland Park Overland Park, KS HC MAGNESIUM, URINE - ARUP | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| Adventhealth South Overland Park Overland Park, KS HC MAGNESIUM URINE CALCULI RISK ASSESSMENT - ARUP | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| Adventhealth South Overland Park Overland Park, KS HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| Adventhealth South Overland Park Overland Park, KS HC ASSAY OF MAGNESIUM - MAGNESIUM RBC | $222.26 | $222.26 | — | — | Apr 1, 2026 source file |
Outpatient: lowest $4.64, median $37.92, highest $185.01 — a 39.9× difference within the same market.
As an inpatient, the same code is billed by 4 facilities here, median $37.92. 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 4 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 2 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.