Phosphorus test cost in Oshkosh, WI — inpatient
In Oshkosh-Neenah, WI, 2 hospitals list a cash price for phosphorus (phosphate) blood test as an inpatient: from $19.66 to $47.50, with a median of $33.58. The lowest listed price is at Childrens Hospital of Wisconsin Fox Valley — $13.92 less than the median here. Across Wisconsin, the median is $41.60 at 97 hospitals.
Cash prices at 2 facilities across 2 cities for code 84100, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Nov 21, 2025 and Mar 24, 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 Oshkosh-Neenah, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Childrens Hospital of Wisconsin Fox Valley lowest Neenah, WI · (920) 969-7900 HBC FV PHOSPHORUS | $19.66 | $35.75 | $25.03–$33.96 | 45% | Mar 24, 2026 source file |
| Childrens Hospital of Wisconsin Fox Valley lowest Neenah, WI · (920) 969-7900 HBC FV PHOSPHORUS | $19.66 | $35.75 | $25.03–$33.96 | 45% | Mar 24, 2026 source file |
| Aurora Medical Center Oshkosh Oshkosh, WI · (920) 456-6000 PHOSPHORUS | $47.50 | $95.00 | $57.00–$80.75 | 50% | Nov 21, 2025 source file |
Inpatient: lowest $19.66, median $33.58, highest $47.50 — a 2.4× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $19.32 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 2 of 2 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 2 it is 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.