Potassium test cost in Massachusetts
In Massachusetts, 33 hospitals publish a cash price for potassium blood test: from $7.72 to $104.00, with a median of $31.00. The lowest price is at Boston Medical Center South (Brockton). The highest price is 13.5× 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$7.72Boston Medical Center South
Median$31.00half of hospitals charge less
Highest$104.00in Massachusetts
Lowest saves$23.28vs the median
Hospitals in Massachusetts, cheapest first
| Hospital | Cash price | List price | File date |
|---|---|---|---|
| Boston Medical Center South lowest Brockton · Boston-Cambridge-Newton, MA-NH HC Chg Potassium Serum Plasma/Whole Blood | $7.72 | $17.15 | — source file |
| Boston Medical Center Brighton Boston · Boston-Cambridge-Newton, MA-NH HC Chg Potassium Serum Plasma/Whole Blood | $8.78 | $19.51 | — source file |
| Lowell General Hospital Lowell · Boston-Cambridge-Newton, MA-NH HC Assay of Serum Potassium - Potassium | $11.90 | $17.00 | — source file |
| Melrosewakefield Healthcare Melrose · Boston-Cambridge-Newton, MA-NH HC Assay of Serum Potassium - Potassium | $11.90 | $17.00 | — source file |
| Tufts Medical Center Boston · Boston-Cambridge-Newton, MA-NH HC Assay of Serum Potassium - Potassium | $11.90 | $17.00 | — source file |
| Beth Israel Deaconess Hospital - Plymouth Plymouth · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $12.00 | $12.00 | Apr 1, 2026 source file |
| Boston Medical Center Boston · Boston-Cambridge-Newton, MA-NH HC Chg Potassium Serum Plasma/Whole Blood POC | $12.60 | $28.00 | — source file |
| Signature Healthcare Brockton Hospital Brockton · Boston-Cambridge-Newton, MA-NH ASSAY OF SERUM POTASSIUM | $13.30 | $19.00 | Jan 28, 2026 source file |
| The Mercy Hospital Springfield · Springfield, MA HC Potassium Serum/Plasma/Whole Blood | $16.90 | $26.00 | Mar 31, 2026 source file |
| Brown University Health Morton Hospital Taunton · Providence-Warwick, RI-MA HC POTASSIUM SERUM | $17.15 | $17.15 | — source file |
| Emerson Hospital Concord · Boston-Cambridge-Newton, MA-NH POTASSIUM | $18.75 | $25.00 | May 18, 2026 source file |
| Southcoast Hospitals Group Fall River · Providence-Warwick, RI-MA HC Assay of Serum Potassium | $19.50 | $39.00 | — source file |
| Southcoast Hospitals Group - St. Luke's Hospital St. New Bedford · Providence-Warwick, RI-MA HC Assay of Serum Potassium | $19.50 | $39.00 | — source file |
| Southcoast Hospitals Group - Tobey Hospital Campus Wareham · Boston-Cambridge-Newton, MA-NH HC Assay of Serum Potassium | $19.50 | $39.00 | — source file |
| Saint Anne's Hospital Fall River · Providence-Warwick, RI-MA HC POTASSIUM SERUM | $22.27 | $22.27 | — source file |
| Cambridge Health Alliance Cambridge · Boston-Cambridge-Newton, MA-NH HC Potassium Resp Ther | $23.00 | $23.00 | — source file |
| Beth Israel Deaconess Hospital-Milton Milton · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $31.00 | $31.00 | Apr 1, 2026 source file |
| Beth Israel Deaconess Hospital - Needham Needham · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $37.00 | $37.00 | Apr 1, 2026 source file |
| Mount Auburn Hospital Cambridge · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $39.00 | $39.00 | Apr 1, 2026 source file |
| Berkshire Medical Center Pittsfield · Pittsfield, MA Potassium Serum Plas/Whl Blood | $39.79 | $41.88 | Mar 25, 2026 source file |
| Fairview Hospital Great Barrington · Pittsfield, MA Potassium Serum Plas/Whl Blood | $39.79 | $41.88 | Mar 25, 2026 source file |
| North Adams Regional Hospital North Adams · Pittsfield, MA Potassium Serum Plas/Whl Blood | $39.79 | $41.88 | Mar 25, 2026 source file |
| UMass Memorial Medical Center Worcester · Worcester, MA HC Potassium | $40.00 | $40.00 | Mar 26, 2026 source file |
| Beth Israel Deaconess Medical Center Boston · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $41.00 | $41.00 | Apr 1, 2026 source file |
| UMass Memorial Health - Harrington Hospital Southbridge · Worcester, MA HC Potassium; Serum | $41.00 | $41.00 | Apr 3, 2026 source file |
| Shriners Childrens - Boston Boston · Boston-Cambridge-Newton, MA-NH ASSAY OF SERUM POTASSIUM | $44.50 | $44.50 | — source file |
| HealthAlliance - Clinton Hospital Leominster · Worcester, MA HC Potassium | $45.00 | $45.00 | Mar 26, 2026 source file |
| New England Baptist Hospital Boston · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $54.00 | $54.00 | Apr 1, 2026 source file |
| Anna Jaques Hospital Newburyport · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $59.00 | $59.00 | Apr 1, 2026 source file |
| Milford Regional Medical Center Milford · Worcester, MA Potassium | $73.00 | $73.00 | — source file |
| Lahey Hospital & Medical Center, Burlington Burlington · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $75.00 | $75.00 | Apr 1, 2026 source file |
| Holyoke Medical Center Holyoke · Springfield, MA Assay Of Serum Potassium | $86.00 | $86.00 | — source file |
| Winchester Hospital Winchester · Boston-Cambridge-Newton, MA-NH CHG POTASSIUM SERUM PLASMA/WHOLE BLOOD | $104.00 | $104.00 | Apr 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 |
|---|---|---|---|
| Boston-Cambridge-Newton, MA-NH | 20 | $7.72 | $21.25 |
| Providence-Warwick, RI-MA | 4 | $17.15 | $19.50 |
| Worcester, MA | 4 | $40.00 | $43.00 |
| Pittsfield, MA | 3 | $39.79 | $39.79 |
| Springfield, MA | 2 | $16.90 | $51.45 |
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
- Michigan$22.53
- Minnesota$44.90
- Mississippi$27.00
- Missouri$41.32
- 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.