BUN test cost in Oshkosh, WI
In Oshkosh-Neenah, WI, 5 hospitals list a cash price for blood urea nitrogen (BUN) test: from $10.83 to $22.50, with a median of $16.07. The lowest listed price is at Ascension NE Wisconsin - Mercy Campus — $5.24 less than the median here. Across Wisconsin, the median is $25.74 at 94 hospitals.
Cash prices at 5 facilities across 2 cities for code 84520, as an outpatient — the setting a self-pay patient normally buys. 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 |
|---|---|---|---|---|---|
| Ascension NE Wisconsin - Mercy Campus lowest Oshkosh, WI HC ASSAY OF UREA NITROGEN | $10.83 | $19.00 | $4.15–$13.19 | 43% | — source file |
| Ascension NE Wisconsin - Mercy Campus lowest Oshkosh, WI HC ASSAY OF UREA NITROGEN - POC | $10.83 | $19.00 | $4.15–$13.19 | 43% | — source file |
| ThedaCare Regional Medical Center-Neenah Neenah, WI · (920) 729-3100 BLOOD URIEA NITROGEN | $16.07 | $28.70 | — | 44% | — source file |
| ThedaCare Regional Medical Center-Oshkosh Oshkosh, WI BLOOD URIEA NITROGEN | $16.07 | $28.70 | — | 44% | — source file |
| ThedaCare Regional Medical Center-Neenah Neenah, WI · (920) 729-3100 BLOOD UREA NITROGEN, BLOOD | $16.07 | $28.70 | — | 44% | — source file |
| ThedaCare Regional Medical Center-Oshkosh Oshkosh, WI BLOOD UREA NITROGEN, BLOOD | $16.07 | $28.70 | — | 44% | — source file |
| Childrens Hospital of Wisconsin Fox Valley Neenah, WI · (920) 969-7900 HBC FV UREA NITROGEN BLOOD | $19.66 | $35.75 | $25.03–$33.96 | 45% | Mar 24, 2026 source file |
| Childrens Hospital of Wisconsin Fox Valley Neenah, WI · (920) 969-7900 HBC FV UREA NITROGEN BLOOD | $19.66 | $35.75 | $25.03–$33.96 | 45% | Mar 24, 2026 source file |
| Aurora Medical Center Oshkosh Oshkosh, WI · (920) 456-6000 POC NITROGEN SERUM | $22.50 | $45.00 | $3.16–$38.25 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Oshkosh Oshkosh, WI · (920) 456-6000 BUN | $27.50 | $55.00 | $3.16–$46.75 | 50% | Nov 21, 2025 source file |
Outpatient: lowest $10.83, median $16.07, highest $22.50 — a 2.1× difference within the same market.
As an inpatient, the same code is billed by 2 facilities here, median $21.08. 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 3 of 3 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 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 BUN test measures urea nitrogen, a waste product removed by the kidneys. It is used with creatinine to check kidney function and hydration.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.