BUN test cost in Louisville, KY
In Louisville/Jefferson County, KY-IN, 17 hospitals list a cash price for blood urea nitrogen (BUN) test: from $8.40 to $50.40, with a median of $45.00. The lowest listed price is at University of Louisville Hospital — $36.60 less than the median here. Across Kentucky, the median is $45.68 at 76 hospitals.
Cash prices at 17 facilities across 9 cities for code 84520, as an outpatient — the setting a self-pay patient normally buys. Collected Oct 2, 2026; the hospital files themselves were last updated between Feb 11, 2026 and Sep 25, 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 Louisville/Jefferson County, KY-IN.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| University of Louisville Hospital lowest Louisville, KY · (502) 562-3000 UREA NITROGEN SRM/BUN source file | $8.40 | $35.00 | $5.88–$35.00 | 76% |
| St. Vincent Salem Hospital Salem, IN · (812) 883-5881 #UREA NITROGEN; QUANTITATIVE+1 more line at this price source file | $9.00 | $15.00 | $1.87–$9.01 | 40% |
| University of Louisville Hospital Louisville, KY · (502) 562-3000 ASSAY OF UREA NITROGEN source file | $9.84 | $41.00 | $6.89–$41.00 | 76% |
| Norton Clark Hospital Jeffersonville, IN · (812) 283-2147 HB BUN File of Jun 3, 2026 · source file | $13.86 | $99.00 | $3.35–$86.63 | 86% |
| Saints Mary & Elizabeth Hospital Louisville, KY ASSAY OF UREA NITROGEN source file | $18.00 | $50.00 | $8.40–$50.00 | 64% |
| UofL Health-Louisville – South Hospital Shepherdville, KY ASSAY OF UREA NITROGEN source file | $19.35 | $43.00 | $7.22–$43.00 | 55% |
| UofL Health - Jewish Hospital and Mary & Elizabeth Hospital Louisville, KY · (502) 587-4011 ASSAY OF UREA NITROGEN source file | $31.95 | $71.00 | $11.93–$71.00 | 55% |
| UofL Health -Shelbyville Shelbyville, KY · (502) 647-4000 ASSAY OF UREA NITROGEN source file | $40.28 | $106.00 | $14.19–$106.00 | 62% |
| CHI Saint Joseph Flaget Memorial Hospital Bardstown, KY · (502) 350-5000 HC LAB UREA NITROGEN BLOOD File of Feb 28, 2026 · source file | $42.01 | $99.00 | $3.35–$90.09 | 58% |
| Norton Brownsboro Hospital Louisville, KY HB BUN File of Feb 11, 2026 · source file | $45.00 | $225.00 | $3.95–$186.75 | 80% |
| Norton Hospital Louisville, KY · (502) 629-8000 HB BUN File of Feb 11, 2026 · source file | $45.00 | $225.00 | $3.95–$186.75 | 80% |
| Norton Children's Hospital Louisville, KY HB BUN File of Feb 11, 2026 · source file | $45.00 | $225.00 | $3.95–$191.25 | 80% |
| Norton Women's and Kosair Children's Hospital Louisville, KY HB BUN File of Feb 13, 2026 · source file | $45.00 | $225.00 | $3.95–$186.75 | 80% |
| Norton West Louisville Hospital Louisville, KY HB BUN File of Feb 11, 2026 · source file | $45.00 | $225.00 | $3.95–$186.75 | 80% |
| Baptist Health LaGrange La Grange, KY · (502) 222-5388 Urea nitrogen level to assess kidney function, quantitative File of Sep 25, 2026 · source file | $46.61 | $62.14 | $3.35–$124.28 | 25% |
| Baptist Health Louisville Louisville, KY · (502) 897-8100 Urea nitrogen level to assess kidney function, quantitative File of Sep 25, 2026 · source file | $46.61 | $62.14 | $2.37–$124.28 | 25% |
| Baptist Health Floyd New Albany, IN · (812) 944-7701 Urea nitrogen level to assess kidney function, quantitative File of Sep 25, 2026 · source file | $46.61 | $62.14 | $3.35–$93.21 | 25% |
| Harrison County Hospital Corydon, IN · (812) 738-4251 Urea nitrogen level to assess kidney function, quantitative File of Jul 16, 2026 · source file | $50.40 | $84.00 | $1.98–$75.60 | 40% |
| St. Vincent Salem Hospital Salem, IN · (812) 883-5881 UREA NITROGEN QUANTITATIVE+1 more line at this price source file | $70.20 | $117.00 | $1.87–$9.01 | 40% |
Outpatient: lowest $8.40, median $45.00, highest $50.40 — a 6.0× difference within the same market.
As an inpatient, the same code is billed by 13 facilities here, median $40.28. 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 17 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 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 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.