BUN test cost in Santa Rosa, CA
In Santa Rosa-Petaluma, CA, 6 hospitals list a cash price for blood urea nitrogen (BUN) test: from $19.04 to $106.00, with a median of $32.90. The lowest listed price is at Kaiser Foundation Hospital - Santa Rosa — $13.86 less than the median here. Across California, the median is $36.92 at 195 hospitals.
Cash prices at 6 facilities across 4 cities for code 84520, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 29, 2026; the hospital files themselves were last updated between Apr 1, 2026 and May 22, 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 Santa Rosa-Petaluma, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Kaiser Foundation Hospital - Santa Rosa lowest Santa Rosa, CA · (707) 571-4000 ASSAY OF UREA NITROGEN QUANTITATIVE File of Apr 1, 2026 · source file | $19.04 | $34.00 | $3.00–$10.00 | 44% |
| Petaluma Valley Hospital Petaluma, CA · (707) 778-1111 HC ASSAY OF UREA NITROGEN QUANTITATIVE LAB+1 more line at this price File of Apr 1, 2026 · source file | $25.50 | $50.00 | — | 49% |
| Healdsburg Hospital Healdsburg, CA · (707) 431-6500 HC BUN File of Apr 1, 2026 · source file | $32.64 | $64.00 | — | 49% |
| Providence Santa Rosa Memorial Hospital Santa Rosa, CA · (707) 525-5300 HC BUN+1 more line at this price File of Apr 1, 2026 · source file | $33.15 | $65.00 | — | 49% |
| Sonoma Valley Hospital Sonoma, CA · (707) 935-5000 Urea nitrogen level to assess kidney function, quantitative File of May 22, 2026 · source file | $97.30 | $139.00 | $3.87–$250.20 | 30% |
| Sutter Santa Rosa Regional Hospital Santa Rosa, CA · (707) 576-4000 HCHG CORE UREA NITROGEN QUANTITATIVE+1 more line at this price File of Apr 1, 2026 · source file | $106.00 | $106.00 | — | — |
| Providence Santa Rosa Memorial Hospital Santa Rosa, CA · (707) 525-5300 HC BUN+1 more line at this price File of Apr 1, 2026 · source file | $142.29 | $279.00 | — | 49% |
| Petaluma Valley Hospital Petaluma, CA · (707) 778-1111 HC ASSAY OF UREA NITROGEN QUANTITATIVE LAB+1 more line at this price File of Apr 1, 2026 · source file | $148.92 | $292.00 | — | 49% |
Outpatient: lowest $19.04, median $32.90, highest $106.00 — a 5.6× difference within the same market.
As an inpatient, the same code is billed by 5 facilities here, median $106.00. 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 1 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 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.