Magnesium test cost in Kansas City, MO — inpatient
In Kansas City, MO-KS, 4 hospitals list a cash price for magnesium blood test as an inpatient: 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 4 facilities across 3 cities for code 83735, as an inpatient (admitted to hospital) . 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 · (816) 691-2000 SR MG URINE | $4.64 | $16.00 | $9.60–$13.09 | 71% | Mar 6, 2026 source file |
| NKC Health North Kansas City, MO · (816) 691-2000 MAGNESIUM LEVEL | $34.51 | $119.00 | $71.40–$97.34 | 71% | Mar 6, 2026 source file |
| Children's Mercy Hospital Kansas City, MO · (816) 234-3000 URINE SAT PANEL MAGNESIUM | $37.92 | $79.00 | $37.92–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas City, MO · (816) 234-3000 MAGNESIUM MAIN | $37.92 | $79.00 | $37.92–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas City, MO · (816) 234-3000 MAGNESIUM URINE | $37.92 | $79.00 | $37.92–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas Overland Park, KS · (913) 696-8000 MAGNESIUM MAIN | $37.92 | $79.00 | $37.92–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas Overland Park, KS · (913) 696-8000 MAGNESIUM URINE | $37.92 | $79.00 | $37.92–$71.10 | 52% | — source file |
| Children's Mercy Hospital Kansas Overland Park, KS · (913) 696-8000 URINE SAT PANEL MAGNESIUM | $37.92 | $79.00 | $37.92–$71.10 | 52% | — source file |
| NKC Health North Kansas City, MO · (816) 691-2000 MAGNESIUM OTHER | $42.05 | $145.00 | $87.00–$118.61 | 71% | Mar 6, 2026 source file |
| AdventHealth South Overland Park Overland Park, KS · (913) 373-2000 HC MAGNESIUM LEVEL | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| AdventHealth South Overland Park Overland Park, KS · (913) 373-2000 HC MAGNESIUM URINE RANDOM | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| AdventHealth South Overland Park Overland Park, KS · (913) 373-2000 HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| AdventHealth South Overland Park Overland Park, KS · (913) 373-2000 HC MAGNESIUM URINE CALCULI RISK ASSESSMENT - ARUP | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| AdventHealth South Overland Park Overland Park, KS · (913) 373-2000 HC MAGNESIUM - SUPERSATURATION PROFILE, URINE - ARUP | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| AdventHealth South Overland Park Overland Park, KS · (913) 373-2000 HC MAGNESIUM, URINE - ARUP | $185.01 | $185.01 | — | — | Apr 1, 2026 source file |
| AdventHealth South Overland Park Overland Park, KS · (913) 373-2000 HC ASSAY OF MAGNESIUM - MAGNESIUM RBC | $222.26 | $222.26 | — | — | Apr 1, 2026 source file |
Inpatient: lowest $4.64, median $37.92, highest $185.01 — a 39.9× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $37.92 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 3 of 3 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.