Potassium test cost in Waterloo, IA — inpatient
In Waterloo-Cedar Falls, IA, 4 hospitals list a cash price for potassium blood test as an inpatient: from $24.72 to $33.57, with a median of $29.25. The lowest listed price is at Grundy County Memorial Hospital — $4.53 less than the median here. Across Iowa, the median is $34.00 at 78 hospitals.
Cash prices at 4 facilities across 3 cities for code 84132, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Jan 28, 2026 and Jun 29, 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 Waterloo-Cedar Falls, IA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Grundy County Memorial Hospital lowest Grundy Center, IA · (319) 824-5421 POTASSIUM /ALL | $24.72 | $30.90 | $20.00–$30.00 | 20% | Jun 29, 2026 source file |
| Grundy County Memorial Hospital lowest Grundy Center, IA · (319) 824-5421 REPEAT POTASSIUM TEST /G | $24.72 | $30.90 | $20.00–$30.00 | 20% | Jun 29, 2026 source file |
| MercyOne Waterloo Medical Center Waterloo, IA · (319) 272-8000 HC Potassium Serum/Plasma/Whole Blood | $29.25 | $45.00 | $4.61–$45.00 | 35% | Mar 31, 2026 source file |
| Sartori Memorial Hospital Cedar Falls, IA · (319) 268-3000 HC Potassium Serum/Plasma/Whole Blood | $29.25 | $45.00 | $4.61–$45.00 | 35% | Mar 31, 2026 source file |
| Allen Hospital Waterloo, IA · (319) 235-3941 HC ASSAY OF SERUM POTASSIUM | $33.57 | $41.96 | $27.15 | 20% | Jan 28, 2026 source file |
Inpatient: lowest $24.72, median $29.25, highest $33.57 — a 1.4× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $29.25 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 3 of 4 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it 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 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.