Phosphorus test cost in Buffalo, NY — inpatient
In Buffalo-Cheektowaga, NY, 7 hospitals list a cash price for phosphorus (phosphate) blood test as an inpatient: from $4.74 to $49.65, with a median of $17.85. The lowest listed price is at Mount St. Mary's Hospital and 2 other hospitals — $13.11 less than the median here. Across New York, the median is $20.17 at 109 hospitals.
Cash prices at 7 facilities across 3 cities for code 84100, as an inpatient (admitted to hospital) . Collected Oct 2, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Oct 1, 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 Buffalo-Cheektowaga, NY.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Mount St. Mary's Hospital lowest Lewiston, NY · (716) 297-4800 HC RBC Osmotic Fragility - Phosphorus File of Apr 1, 2026 · source file | $4.74 | $12.00 | $3.56–$12.00 | 61% |
| Sisters of Charity Hospital lowest Buffalo, NY · (716) 862-1000 HC RBC Osmotic Fragility - Phosphorus File of Apr 1, 2026 · source file | $4.74 | $12.00 | $3.56–$12.00 | 61% |
| Mercy Hospital of Buffalo lowest Buffalo, NY · (716) 826-7000 HC RBC Osmotic Fragility - Phosphorus File of Apr 1, 2026 · source file | $4.74 | $12.00 | $3.56–$12.00 | 61% |
| Bertrand Chaffee Hospital Springville, NY · (716) 592-2871 PHOSPHORUS BLOOD LAB+1 more line at this price File of Oct 1, 2026 · source file | $17.85 | $21.00 | $3.16–$21.00 | 15% |
| Erie County Medical Center Buffalo, NY · (716) 898-3936 ASSY OF INORG PHOPH PHOSPHORUS+1 more line at this price File of Aug 25, 2026 · source file | $20.17 | $44.60 | $3.56–$40.14 | 55% |
| Kaleida Health Buffalo, NY · (716) 859-8620 Phosphate+1 more line at this price File of Apr 1, 2026 · source file | $48.00 | $48.00 | — | — |
| Roswell Park Cancer Institute Buffalo, NY Noncdm Charge Record File of Apr 1, 2026 · source file | $49.65 | $49.65 | — | — |
| Roswell Park Cancer Institute Buffalo, NY Phosphorus File of Apr 1, 2026 · source file | $53.09 | $53.09 | — | — |
Inpatient: lowest $4.74, median $17.85, highest $49.65 — a 10.5× difference within the same market.
As an outpatient, the same code is billed by 8 facilities here, median $15.16 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 5 of 5 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.