Potassium test cost in Missouri
In Missouri, 64 hospitals publish a cash price for potassium blood test: from $4.00 to $505.55, with a median of $41.32. The lowest price is at St Joseph Medical Center (Kansas City). The highest price is 126.4× the lowest.
Outpatient cash prices, one line per hospital — its lowest listed price for code 84132. Prices for both sides of the body and inpatient prices are not mixed in. Collected Sep 29, 2026. See them on a map
Lowest$4.00St Joseph Medical Center
Median$41.32half of hospitals charge less
Highest$505.55in Missouri
Lowest saves$37.32vs the median
Hospitals in Missouri, cheapest first
| Hospital | Cash price | List price | File date |
|---|---|---|---|
| St Joseph Medical Center lowest Kansas City · Kansas City, MO-KS Hc Assay Of Serum Potassium | $4.00 | $98.67 | Mar 17, 2026 source file |
| Ranken Jordan Pediatric Bridge Hospital Maryland Heights · St. Louis, MO-IL Potassium Level | $5.28 | $6.60 | Apr 24, 2026 source file |
| Oklahoma Spine Hospital Kansas City · Kansas City, MO POTASSIUM ISTAT | $10.00 | $44.17 | — source file |
| Nevada City Hospital Nevada · Nevada, MO POTASSIUM LEVEL | $11.25 | $25.00 | — source file |
| Boone Hospital Center Columbia · Columbia, MO POTASSIUM | $12.08 | $20.14 | Apr 1, 2026 source file |
| Mercy Hospital Jefferson Festus · St. Louis, MO-IL Potassium Plasma/Wb | $16.25 | $25.00 | — source file |
| Liberty Hospital Liberty · Kansas City, MO-KS LAB ASSAY OF SERUM POTASS | $17.00 | $63.00 | — source file |
| NKC Health North Kansas City · Kansas City, MO-KS POTASSIUM BLOOD | $17.98 | $62.00 | Mar 6, 2026 source file |
| Citizens Memorial Hospital Bolivar · Springfield, MO BLOOD POTASSIUM LEVEL | $18.40 | $23.00 | — source file |
| Sullivan County Memorial Hospital Milan · Milan, MO POTASSIUM SERUM | $19.00 | $19.00 | Jul 1, 2026 source file |
| Missouri Delta Medical Center Sikeston · Sikeston, MO Assay of Serum Potassium | $19.06 | $76.25 | Aug 7, 2026 source file |
| Cox Medical Center Branson Branson · Branson, MO BLOOD POTASSIUM LEVEL | $19.70 | $86.80 | — source file |
| Harrison County Community Hospital Bethany · Bethany, MO POTASSIUM W/MOD | $20.15 | $31.00 | Sep 10, 2025 source file |
| Lester E Cox Medical Centers Springfield · Springfield, MO BLOOD POTASSIUM LEVEL | $21.87 | $86.80 | — source file |
| Community Hospital Association Fairfax · Fairfax, MO POTASSIUM | $24.50 | $35.00 | Aug 21, 2026 source file |
| Curators of the University of Missouri Columbia · Columbia, MO POTASSIUM LEVEL P28620302 | $25.53 | $42.55 | Dec 15, 2025 source file |
| Mercy Hospital Lebanon Lebanon · Lebanon, MO Potassium Plasma/Wb | $26.00 | $40.00 | — source file |
| Cox-Monett Hospital Monett · Monett, MO BLOOD POTASSIUM LEVEL | $26.47 | $86.80 | — source file |
| Children's Mercy Hospital Kansas City · Kansas City, MO-KS POTASSIUM BLOOD CMK | $26.88 | $56.00 | — source file |
| Pike County Memorial Hospital Lousiana · Lousiana, MO Potassium Level | $27.20 | $34.00 | — source file |
| Hermann Area Hospital District Hermann · Hermann, MO Blood potassium level | $27.30 | $45.50 | Jan 24, 2026 source file |
| Mercy Hospital Washington Washington · St. Louis, MO-IL POC Potassium Ser Plasma Wb | $27.30 | $42.00 | — source file |
| Cox Barton County Hospital Lamar · Lamar, MO BLOOD POTASSIUM LEVEL | $27.69 | $86.80 | — source file |
| Mercy Perry Perryville · Perryville, MO Potassium Plasma/Wb | $27.95 | $43.00 | — source file |
| Golden Valley Memorial Hospital Clinton · Clinton, MO ASSAY OF SERUM POTASSIUM | $28.70 | $47.84 | — source file |
| Mercy Hospital Southeast Cape Girardeau · Cape Girardeau, MO-IL POC Potassium Ser Plasma Wb | $31.20 | $48.00 | — source file |
| Texas County Memorial Hospital Houston · Houston, MO POTASSIUM | $31.26 | $44.65 | — source file |
| Bothwell Regional Health Center Sedalia · Sedalia, MO BLOOD POTASSIUM LEVEL | $33.00 | $44.00 | — source file |
| Mercy Hospital South Saint Louis · St. Louis, MO-IL Potassium Plasma/Wb | $33.80 | $52.00 | — source file |
| Shriners Childrens - St Louis Saint Louis · St. Louis, MO-IL ASSAY OF SERUM POTASSIUM | $36.10 | $36.10 | — source file |
| Ste. Genevieve County Memorial Hospital Ste. Genevieve · Ste. Genevieve, MO POTASSIUM SERUM | $38.75 | $77.50 | May 19, 2026 source file |
| Saint Francis Medical Center Cape Girardeau · Cape Girardeau, MO-IL Hc Electrolyte-K | $40.00 | $40.00 | Apr 1, 2026 source file |
| Freeman Health System - Freeman West Joplin · Joplin, MO-KS POTASSIUM SERUM | $42.63 | $106.58 | Sep 1, 2026 source file |
| Freeman Neosho Hospital Neosho · Joplin, MO-KS POTASSIUM SERUM | $42.63 | $106.58 | Sep 1, 2026 source file |
| Mercy Hospital Carthage Carthage · Joplin, MO-KS Potassium Plasma/Wb | $42.90 | $66.00 | — source file |
| Cass Regional Medical Center Harrisonville · Kansas City, MO-KS 84132 POTASSIUM, SERUM | $43.40 | $62.00 | Apr 7, 2026 source file |
| Mercy Hospital Aurora Aurora · Aurora, MO POC Potassium Ser Plasma Wb | $44.20 | $68.00 | — source file |
| Mercy Hospital Cassville Cassville · Cassville, MO Potassium Plasma/Wb | $44.20 | $68.00 | — source file |
| Mercy St. Francis Hospital Mountain View · West Plains, MO Potassium Plasma/Wb | $44.20 | $68.00 | — source file |
| Mercy Hospital Lincoln Troy · St. Louis, MO-IL Potassium Plasma/Wb | $44.85 | $69.00 | — source file |
| Moberly Regional Medical Center Moberly · Moberly, MO POTASSIUM SER PL WB | $46.19 | $171.07 | Apr 1, 2026 source file |
| Scotland County Memorial Hospital Memphis · Memphis, MO SERUM POTASSIUM | $47.60 | $68.00 | Oct 24, 2025 source file |
| Mercy Hospital St Louis Saint Louis · St. Louis, MO-IL POC Potassium Ser Plasma Wb | $48.75 | $75.00 | — source file |
| Poplar Bluff Regional Medical Center Poplar Bluff · Poplar Bluff, MO 84132 POTASSIUM SER PL WB | $49.47 | $235.57 | Apr 1, 2026 source file |
| Heartland Long Term Acute Hospital St. Joseph · St. Joseph, MO-KS HC ASSAY OF SERUM POTASSIUM - POTASSIUM | $51.00 | $60.00 | Jun 23, 2026 source file |
| Mosaic Life Care at St Joseph Medical Center St. Joseph · St. Joseph, MO-KS HC ASSAY OF SERUM POTASSIUM - POTASSIUM | $51.00 | $60.00 | Sep 26, 2025 source file |
| Mosaic Medical Center Albany Albany · Albany, MO HC ASSAY OF SERUM POTASSIUM - POTASSIUM | $51.00 | $60.00 | Sep 26, 2025 source file |
| Mosaic Medical Center Maryville Maryville · Maryville, MO HC ASSAY OF SERUM POTASSIUM - POTASSIUM | $51.00 | $60.00 | Sep 26, 2025 source file |
| Mercy Hospital Stoddard Dexter · Dexter, MO POC Potassium Ser Plasma Wb | $53.30 | $82.00 | — source file |
| Northeast Regional Medical Center Kirksville · Kirksville, MO POTASSIUM SER PL WB | $59.91 | $249.61 | Apr 1, 2026 source file |
| Mercy Hospital Springfield Springfield · Springfield, MO Potassium Plasma/Wb | $60.45 | $93.00 | — source file |
| Mercy Orthopedic Hospital Springfield Ozark · Springfield, MO POC Potassium Ser Plasma Wb | $60.45 | $93.00 | — source file |
| Lake Regional Health System Osage Beach · Osage Beach, MO Assay of serum potassium | $65.10 | $217.00 | Sep 2, 2026 source file |
| Mercy Hospital Joplin Joplin · Joplin, MO-KS Potassium Plasma/Wb | $66.95 | $103.00 | — source file |
| Fitzgibbon Hospital Marshall · Marshall, MO Blood potassium level | $74.05 | $92.56 | Feb 2, 2026 source file |
| Bates County Memorial Hospital Butler · Kansas City, MO-KS POTASSIUM | $79.50 | $113.57 | Apr 20, 2026 source file |
| Madison Medical Center Fredericktown · Fredericktown, MO POTASSIUM | $83.00 | $17.00 | Jan 5, 2025 source file |
| Phelps Health Rolla · Rolla, MO BLOOD POTASSIUM LEVEL | $91.95 | $131.35 | — source file |
| Lafayette Regional Health Center Lexington · Kansas City, MO-KS POTASSIUM BLD | $214.75 | $214.75 | Sep 1, 2026 source file |
| Lee's Summit Medical Center Lee's Summit · Kansas City, MO-KS Potassium; serum, plasma or whole blood | $318.55 | $318.55 | Sep 1, 2026 source file |
| Research Medical Center Kansas City · Kansas City, MO-KS Potassium; serum, plasma or whole blood | $345.86 | $345.86 | Sep 1, 2026 source file |
| Research Psychiatric Center Kansas City · Kansas City, MO-KS POTASSIUM BLD | $345.86 | $345.86 | Sep 1, 2026 source file |
| Belton Regional Medical Center Kansas City · Kansas City, MO-KS Potassium; serum, plasma or whole blood | $401.20 | $401.20 | Sep 1, 2026 source file |
| Centerpoint Medical Center Independence · Kansas City, MO-KS POTASSIUM BLD | $505.55 | $505.55 | Sep 1, 2026 source file |
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
File date When the hospital last updated its price file, as the file says itself. A dash means the file gives no date.
No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More
By metro area
Each metro page compares every listing, including prices for both sides of the body.
| Metro area | Hospitals | Lowest | Median |
|---|---|---|---|
| Kansas City, MO-KS | 12 | $4.00 | $147.12 |
| St. Louis, MO-IL | 7 | $5.28 | $33.80 |
| Joplin, MO-KS | 4 | $42.63 | $42.76 |
| Springfield, MO | 4 | $18.40 | $41.16 |
| Cape Girardeau, MO-IL | 2 | $31.20 | $35.60 |
| Columbia, MO | 2 | $12.08 | $18.80 |
| St. Joseph, MO-KS | 2 | $51.00 | $51.00 |
| Albany, MO | 1 | $51.00 | $51.00 |
| Aurora, MO | 1 | $44.20 | $44.20 |
| Bethany, MO | 1 | $20.15 | $20.15 |
| Branson, MO | 1 | $19.70 | $19.70 |
| Cassville, MO | 1 | $44.20 | $44.20 |
| Clinton, MO | 1 | $28.70 | $28.70 |
| Dexter, MO | 1 | $53.30 | $53.30 |
| Fairfax, MO | 1 | $24.50 | $24.50 |
| Fredericktown, MO | 1 | $83.00 | $83.00 |
| Hermann, MO | 1 | $27.30 | $27.30 |
| Houston, MO | 1 | $31.26 | $31.26 |
| Kansas City, MO | 1 | $10.00 | $10.00 |
| Kirksville, MO | 1 | $59.91 | $59.91 |
| Lamar, MO | 1 | $27.69 | $27.69 |
| Lousiana, MO | 1 | $27.20 | $27.20 |
| Lebanon, MO | 1 | $26.00 | $26.00 |
| Memphis, MO | 1 | $47.60 | $47.60 |
| Milan, MO | 1 | $19.00 | $19.00 |
| Monett, MO | 1 | $26.47 | $26.47 |
| Marshall, MO | 1 | $74.05 | $74.05 |
| Maryville, MO | 1 | $51.00 | $51.00 |
| Moberly, MO | 1 | $46.19 | $46.19 |
| Nevada, MO | 1 | $11.25 | $11.25 |
| Osage Beach, MO | 1 | $65.10 | $65.10 |
| Perryville, MO | 1 | $27.95 | $27.95 |
| Poplar Bluff, MO | 1 | $49.47 | $49.47 |
| Rolla, MO | 1 | $91.95 | $91.95 |
| Ste. Genevieve, MO | 1 | $38.75 | $38.75 |
| Sedalia, MO | 1 | $33.00 | $33.00 |
| Sikeston, MO | 1 | $19.06 | $19.06 |
| West Plains, MO | 1 | $44.20 | $44.20 |
Market A metro area (as the Census Bureau defines it) or, outside metro areas, a town. Each links to every hospital price there.
Hospitals How many hospitals publish a cash price for this code here. Each hospital counts once, at its lowest outpatient cash price.
Lowest The lowest cash price among those hospitals.
Median The middle cash price: half of the hospitals charge less, half charge more. One price per hospital. More
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.
Potassium blood test in other states
- Alabama$26.10
- Alaska$61.50
- Arizona$29.95
- Arkansas$19.43
- California$73.26
- Colorado$69.75
- Connecticut$23.15
- Delaware$60.74
- District of Columbia$63.56
- Florida$63.18
- Georgia$32.80
- Hawaii$47.60
- Idaho$35.70
- Illinois$44.80
- Indiana$28.50
- Iowa$34.00
- Kansas$32.76
- Kentucky$46.40
- Louisiana$16.47
- Maine$25.08
- Maryland$11.58
- Massachusetts$31.00
- Michigan$22.53
- Minnesota$44.90
- Mississippi$27.00
- Montana$40.80
- Nebraska$47.81
- Nevada$62.00
- New Hampshire$47.59
- New Jersey$5.90
- New Mexico$63.41
- New York$21.59
- North Carolina$39.30
- North Dakota$41.22
- Ohio$23.35
- Oklahoma$32.55
- Oregon$21.75
- Pennsylvania$33.10
- Puerto Rico$15.00
- Rhode Island$29.50
- South Carolina$41.74
- South Dakota$54.90
- Tennessee$26.13
- Texas$65.23
- Utah$110.70
- Vermont$41.58
- Virginia$39.00
- Washington$40.15
- West Virginia$25.25
- Wisconsin$29.04
- Wyoming$23.20
Median cash price across the state's hospitals.