BUN test cost in Milwaukee, WI
In Milwaukee-Waukesha, WI, 17 hospitals list a cash price for blood urea nitrogen (BUN) test: from $19.08 to $43.31, with a median of $22.50. The lowest listed price is at Ascension SE Wisconsin Hospital - Franklin Campus and 3 other hospitals — $3.42 less than the median here. Across Wisconsin, the median is $25.74 at 94 hospitals.
Cash prices at 17 facilities across 11 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 23, 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 Milwaukee-Waukesha, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Ascension SE Wisconsin Hospital - Franklin Campus lowest Franklin, WI · (414) 447-2130 HC ASSAY OF UREA NITROGEN - POC+1 more line at this price source file | $19.08 | $36.00 | $4.15–$18.56 | 47% |
| Ascension SE Wisconsin Hospital lowest Milwaukee, WI · (414) 447-2130 HC ASSAY OF UREA NITROGEN - POC+1 more line at this price source file | $19.08 | $36.00 | $4.15–$18.56 | 47% |
| Ascension St. Francis Hospital lowest Milwaukee, WI · (414) 647-5000 HC ASSAY OF UREA NITROGEN - POC+1 more line at this price source file | $19.08 | $36.00 | $4.15–$18.56 | 47% |
| Midwest Orthopedic Specialty Hospital lowest Franklin, WI HC ASSAY OF UREA NITROGEN - POC+1 more line at this price source file | $19.08 | $36.00 | $4.15–$18.56 | 47% |
| Aurora Medical Center Kenosha Kenosha, WI · (262) 948-5600 POC NITROGEN SERUM File of Nov 21, 2025 · source file | $22.50 | $45.00 | $3.16–$38.25 | 50% |
| Aurora West Allis Medical Center West Allis, WI · (414) 328-6000 POC NITROGEN SERUM File of Nov 21, 2025 · source file | $22.50 | $45.00 | $3.16–$38.25 | 50% |
| Aurora St. Luke's South Shore of Aurora Health Care Metro Cudahy, WI · (414) 649-6000 POC NITROGEN SERUM File of Nov 21, 2025 · source file | $22.50 | $45.00 | $3.16–$38.25 | 50% |
| Aurora Medical Center Grafton Grafton, WI · (262) 329-1000 POC NITROGEN SERUM File of Nov 21, 2025 · source file | $22.50 | $45.00 | $3.16–$38.25 | 50% |
| Aurora Medical Center Washington County Hartford, WI · (262) 673-2300 POC NITROGEN SERUM File of Nov 21, 2025 · source file | $22.50 | $45.00 | $3.16–$38.25 | 50% |
| Aurora St Lukes Medical Center Milwaukee, WI · (414) 649-6000 POC NITROGEN SERUM File of Nov 21, 2025 · source file | $22.50 | $45.00 | $3.16–$38.25 | 50% |
| Aurora Medical Center Summit Summit, WI · (262) 434-1600 POC NITROGEN SERUM File of Nov 21, 2025 · source file | $22.50 | $45.00 | $3.16–$38.25 | 50% |
| Aurora St Lukes Medical Center of Aurora Health Care Metro Milwaukee, WI · (414) 649-6000 POC NITROGEN SERUM File of Nov 21, 2025 · source file | $22.50 | $45.00 | $3.16–$38.25 | 50% |
| Orthopaedic Hospital of Wisconsin Glendale, WI BUN VENOUS POC+1 more line at this price source file | $25.44 | $48.00 | $3.83–$9.63 | 47% |
| Aurora Medical Center Kenosha Kenosha, WI · (262) 948-5600 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Aurora Medical Center Washington County Hartford, WI · (262) 673-2300 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Aurora Medical Center Summit Summit, WI · (262) 434-1600 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Aurora St Lukes Medical Center Milwaukee, WI · (414) 649-6000 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Aurora St Lukes Medical Center of Aurora Health Care Metro Milwaukee, WI · (414) 649-6000 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Aurora St. Luke's South Shore of Aurora Health Care Metro Cudahy, WI · (414) 649-6000 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Aurora Psychiatric Hospital Wauwatosa, WI · (414) 454-6600 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Aurora West Allis Medical Center West Allis, WI · (414) 328-6000 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Aurora Medical Center Grafton Grafton, WI · (262) 329-1000 BUN File of Nov 21, 2025 · source file | $27.50 | $55.00 | $3.16–$46.75 | 50% |
| Ascension Columbia St. Mary's Hospital - Ozaukee Campus Mequon, WI HC ASSAY OF UREA NITROGEN+1 more line at this price source file | $39.75 | $75.00 | $4.15–$18.02 | 47% |
| Ascension Columbia St. Mary's Hospital - Milwaukee Campus Milwaukee, WI · (414) 585-1374 HC ASSAY OF UREA NITROGEN+1 more line at this price source file | $39.75 | $75.00 | $4.15–$18.02 | 47% |
| Children's Hospital of Wisconsin Milwaukee, WI · (414) 266-3954 HBC UREA NITROGEN FLUID+1 more line at this price File of Mar 23, 2026 · source file | $43.31 | $78.75 | $55.13–$74.81 | 45% |
| Children's Hospital of Wisconsin Milwaukee, WI · (414) 266-3954 HBC UREA NITROGEN BUN+1 more line at this price File of Mar 23, 2026 · source file | $44.55 | $81.00 | $56.70–$76.95 | 45% |
| Children's Hospital of Wisconsin Milwaukee, WI · (414) 266-3954 HBC UREA NITROGEN QUANT ARGINA+1 more line at this price File of Mar 23, 2026 · source file | $60.64 | $110.25 | $77.18–$104.74 | 45% |
Outpatient: lowest $19.08, median $22.50, highest $43.31 — a 2.3× difference within the same market.
As an inpatient, the same code is billed by 13 facilities here, median $22.50. 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 10 of 17 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.