Potassium test cost in Columbia, MO
In Columbia, MO, 2 hospitals list a cash price for potassium blood test: from $12.08 to $25.53, with a median of $18.81. The lowest listed price is at Boone Hospital Center — $6.73 less than the median here. Across Missouri, the median is $41.32 at 64 hospitals.
Cash prices at 2 facilities for code 84132, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 22, 2026; the hospital files themselves were last updated between Dec 15, 2025 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 Columbia, MO.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Boone Hospital Center lowest Columbia, MO · (573) 815-8000 POTASSIUM | $12.08 | $20.14 | — | 40% | Apr 1, 2026 source file |
| Curators of the University of Missouri Columbia, MO · (573) 882-4141 POTASSIUM LEVEL P31020302 | $25.53 | $42.55 | $11.57–$37.44 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO · (573) 882-4141 POTASSIUM SERUM RC | $25.53 | $42.55 | $11.57–$37.44 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO · (573) 882-4141 POTASSIUM LEVEL P28620302 | $25.53 | $42.55 | $11.57–$37.44 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO · (573) 882-4141 POTASSIUM SERUM RC (RT)-JRT | $25.53 | $42.55 | $11.57–$37.44 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO · (573) 882-4141 ASSAY OF SERUM POTASSIUM P28634211 | $29.61 | $49.35 | $13.42–$43.43 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO · (573) 882-4141 POTASSIUM I-STAT POC P31025404 | $32.04 | $53.40 | $14.52–$46.99 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO · (573) 882-4141 POTASSIUM I-STAT POC P28625404 | $32.04 | $53.40 | $14.52–$46.99 | 40% | Dec 15, 2025 source file |
Outpatient: lowest $12.08, median $18.81, highest $25.53 — a 2.1× difference within the same market.
As an inpatient, the same code is billed by 2 facilities here, median $18.81. 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 the one hospital here that publishes insurer rates for this code, the cash price is below the highest rate a health plan has negotiated. 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 potassium test measures the level of potassium in the blood. Doctors check it for people on diuretics or blood pressure drugs, with kidney disease, an irregular heartbeat, or vomiting and diarrhea.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.