Phosphorus test cost in Waterloo, IA
In Waterloo-Cedar Falls, IA, 5 hospitals list a cash price for phosphorus (phosphate) blood test: from $28.01 to $34.84, with a median of $29.25. The lowest listed price is at Grundy County Memorial Hospital — $1.24 less than the median here. Across Iowa, the median is $35.27 at 78 hospitals.
Cash prices at 5 facilities across 4 cities for code 84100, as an outpatient — the setting a self-pay patient normally buys. 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 |
|---|---|---|---|---|
| Grundy County Memorial Hospital lowest Grundy Center, IA · (319) 824-5421 PHOSPHORUS /ALL File of Jun 29, 2026 · source file | $28.01 | $35.02 | $21.00–$33.00 | 20% |
| MercyOne Waterloo Medical Center Waterloo, IA · (319) 272-8000 HC Phosphorus+1 more line at this price File of Mar 31, 2026 · source file | $29.25 | $45.00 | $4.59–$45.00 | 35% |
| Sartori Memorial Hospital Cedar Falls, IA · (319) 268-3000 HC Phosphorus File of Mar 31, 2026 · source file | $29.25 | $45.00 | $4.59–$45.00 | 35% |
| Allen Hospital Waterloo, IA · (319) 235-3941 HC PHOSPHATE File of Jan 28, 2026 · source file | $33.57 | $41.96 | $4.74–$27.15 | 20% |
| Waverly Health Center Waverly, IA · (319) 352-4120 Phosphate level File of Mar 3, 2026 · source file | $34.84 | $67.00 | $25.46–$60.30 | 48% |
| Grundy County Memorial Hospital Grundy Center, IA · (319) 824-5421 LYTES AND OSMOL PANEL, F EFPO Z/W1/R/T/L/M/W/E/J/L1/O/P/W1/PL/E/G1/F1/C2/P1/V/Y/M2/X/D/S/SA/N/T/QC/Q File of Jun 29, 2026 · source file | $57.92 | $72.41 | $43.00–$68.00 | 20% |
| MercyOne Waterloo Medical Center Waterloo, IA · (319) 272-8000 HC Phosphorus File of Mar 31, 2026 · source file | $1,384.00 | — | $4.59–$239.65 | — |
Outpatient: lowest $28.01, median $29.25, highest $34.84 — a 1.2× difference within the same market.
As an inpatient, the same code is billed by 4 facilities here, median $29.25. 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 4 of 5 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 phosphorus test measures phosphate in the blood. It is used with calcium for kidney disease, bone disease and parathyroid problems.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.