Lab tests CPT 84132 Inpatient — admitted to hospital

Potassium test cost in Columbia, MO — inpatient

In Columbia, MO, 2 hospitals list a cash price for potassium blood test as an inpatient: 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 inpatient (admitted to hospital) . Collected Sep 22, 2026; the hospital files themselves were last updated between Dec 15, 2025 and Apr 1, 2026.

Lowest$12.08Boone Hospital Center

Median$18.81half of hospitals charge less

Highest$25.53in this market

Difference2.1×highest vs lowest

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.

median

Lowest $12.08Highest $32.04

Hospitals, cheapest first

Hospital	Cash price	List price	Insurers pay	Off list
Boone Hospital Center lowest Columbia, MO · (573) 815-8000 POTASSIUM File of Apr 1, 2026 · source file	$12.08	$20.14	—	40%
Curators of the University of Missouri Columbia, MO · (573) 882-4141 POTASSIUM LEVEL P31020302+3 more lines at this price File of Dec 15, 2025 · source file	$25.53	$42.55	$11.57–$37.44	40%
Curators of the University of Missouri Columbia, MO · (573) 882-4141 ASSAY OF SERUM POTASSIUM P28634211 File of Dec 15, 2025 · source file	$29.61	$49.35	$13.42–$43.43	40%
Curators of the University of Missouri Columbia, MO · (573) 882-4141 POTASSIUM I-STAT POC P31025404+1 more line at this price File of Dec 15, 2025 · source file	$32.04	$53.40	$14.52–$46.99	40%

Hospital The hospital that published the price, its city and the line exactly as written in its price file.

Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More

List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More

Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More

Off list How much lower the cash price is than the list price.

Inpatient: lowest $12.08, median $18.81, highest $25.53 — a 2.1× difference within the same market.

As an outpatient, the same code is billed by 2 facilities here, median $18.81 — that is the price to compare if you are not being admitted.

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.