Phosphorus test cost in Louisville, KY
In Louisville/Jefferson County, KY-IN, 18 hospitals list a cash price for phosphorus (phosphate) blood test: from $9.84 to $97.20, with a median of $41.18. The lowest listed price is at University of Louisville Hospital — $31.34 less than the median here. Across Kentucky, the median is $52.25 at 78 hospitals.
Cash prices at 18 facilities across 10 cities for code 84100, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 29, 2026; the hospital files themselves were last updated between Feb 11, 2026 and Sep 18, 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 | File date |
|---|---|---|---|---|---|
| University of Louisville Hospital lowest Louisville, KY · (502) 562-3000 ASSAY OF PHOSPHORUS | $9.84 | $41.00 | $6.89–$41.00 | 76% | — source file |
| Norton Clark Hospital Jeffersonville, IN · (812) 283-2147 HB PHOSPHORUS BLOOD | $14.14 | $101.00 | $4.03–$88.38 | 86% | Jun 3, 2026 source file |
| Saints Mary & Elizabeth Hospital Louisville, KY ASSAY OF PHOSPHORUS | $22.32 | $62.00 | $10.42–$62.00 | 64% | — source file |
| Norton West Louisville Hospital Louisville, KY HB PHOSPHORUS BLOOD | $35.80 | $179.00 | $4.74–$148.57 | 80% | Feb 11, 2026 source file |
| Norton Children's Hospital Louisville, KY HB PHOSPHORUS BLOOD | $35.80 | $179.00 | $4.74–$152.15 | 80% | Feb 11, 2026 source file |
| Norton Brownsboro Hospital Louisville, KY HB PHOSPHORUS BLOOD | $35.80 | $179.00 | $4.74–$148.57 | 80% | Feb 11, 2026 source file |
| Norton Women's and Kosair Children's Hospital Louisville, KY HB PHOSPHORUS BLOOD | $35.80 | $179.00 | $4.74–$148.57 | 80% | Feb 13, 2026 source file |
| Norton Hospital Louisville, KY · (502) 629-8000 HB PHOSPHORUS BLOOD | $35.80 | $179.00 | $4.74–$148.57 | 80% | Feb 11, 2026 source file |
| UofL Health - Jewish Hospital and Mary & Elizabeth Hospital Louisville, KY · (502) 587-4011 ASSAY OF PHOSPHORUS | $38.70 | $86.00 | $14.45–$86.00 | 55% | — source file |
| UofL Health-Louisville – South Hospital Shepherdville, KY ASSAY OF PHOSPHORUS | $43.65 | $97.00 | $16.30–$97.00 | 55% | — source file |
| UofL Health -Shelbyville Shelbyville, KY · (502) 647-4000 ASSAY OF PHOSPHORUS | $46.36 | $122.00 | $16.34–$122.00 | 62% | — source file |
| Baptist Health Louisville Louisville, KY · (502) 897-8100 Phosphate level | $58.32 | $77.76 | $2.84–$155.52 | 25% | Sep 18, 2026 source file |
| Baptist Health LaGrange La Grange, KY · (502) 222-5388 Phosphate level | $58.32 | $77.76 | $4.03–$155.52 | 25% | Sep 15, 2026 source file |
| Baptist Health Floyd New Albany, IN · (812) 944-7701 Phosphate level | $58.32 | $77.76 | $4.03–$116.64 | 25% | Sep 15, 2026 source file |
| St. Vincent Salem Hospital Salem, IN · (812) 883-5881 PHOSPHORUS INORGANIC-PHOSPHATE | $60.60 | $101.00 | $2.24–$10.81 | 40% | — source file |
| St. Vincent Salem Hospital Salem, IN · (812) 883-5881 PHOSPHORUS INORGANIC-PHOSPHATE | $60.60 | $101.00 | $2.24–$10.81 | 40% | — source file |
| CHI Saint Joseph Flaget Memorial Hospital Bardstown, KY · (502) 350-5000 HC LAB PHOSPHORUS | $85.29 | $201.00 | $4.03–$182.91 | 58% | Feb 28, 2026 source file |
| Cobalt Rehabilitation Hospital Louisville Clarksville, IN Phosphorus | $95.16 | $95.16 | $4.60–$80.89 | — | Aug 6, 2026 source file |
| Harrison County Hospital Corydon, IN · (812) 738-4251 Phosphate level | $97.20 | $162.00 | $2.37–$145.80 | 40% | Jul 16, 2026 source file |
Outpatient: lowest $9.84, median $41.18, highest $97.20 — a 9.9× difference within the same market.
As an inpatient, the same code is billed by 14 facilities here, median $35.80. 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 16 of 18 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 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.