Phosphorus test cost in Providence, RI
In Providence-Warwick, RI-MA, 12 hospitals list a cash price for phosphorus (phosphate) blood test: from $12.95 to $50.40, with a median of $21.95. The lowest listed price is at Butler Hospital and 2 other hospitals — $9.00 less than the median here. Across Rhode Island, the median is $38.70 at 8 hospitals.
Cash prices at 12 facilities across 8 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 — and —.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Providence-Warwick, RI-MA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Butler Hospital lowest Providence, RI · (401) 455-6270 HC Assay of Inorganic Phosphorus - Phosphorus | $12.95 | $37.00 | $2.90–$32.19 | 65% | — source file |
| Kent County Memorial Hospital lowest Warwick, RI · (401) 737-7010 HC Assay of Inorganic Phosphorus - Phosphorus | $12.95 | $37.00 | $2.18–$36.83 | 65% | — source file |
| Women and Infants Hospital of Rhode Island lowest Providence, RI · (401) 274-1100 HC Assay of Inorganic Phosphorus - Phosphorus | $12.95 | $37.00 | $2.18–$34.04 | 65% | — source file |
| Brown University Health Morton Hospital Taunton, MA · (508) 828-7000 HC PHOSPHORUS | $17.65 | $17.65 | — | — | — source file |
| Southcoast Hospitals Group Fall River, MA · (508) 679-3131 HC Assay of Inorganic Phosphorus | $21.00 | $42.00 | $4.74–$31.96 | 50% | — source file |
| Southcoast Hospitals Group - St. Luke's Hospital St. New Bedford, MA HC Assay of Inorganic Phosphorus | $21.00 | $42.00 | $4.74–$31.96 | 50% | — source file |
| Saint Anne's Hospital Fall River, MA · (508) 674-5600 HC PHOSPHORUS | $22.90 | $22.90 | — | — | — source file |
| Rhode Island Hospital Providence, RI · (401) 444-4000 HC PHOSPHORUS | $38.70 | $38.70 | — | — | — source file |
| Emma Pendleton Bradley Hospital East Providence, RI · (401) 432-1000 HC PHOSPHORUS | $38.70 | $38.70 | — | — | — source file |
| Newport Hospital Newport, RI · (401) 846-6400 HC PHOSPHORUS | $38.70 | $38.70 | — | — | — source file |
| The Miriam Hospital Providence, RI · (401) 793-2500 HC PHOSPHORUS | $38.70 | $38.70 | — | — | — source file |
| South County Health Wakefield, RI · (401) 782-8000 Phosphorus inorganic (phosphate) | $50.40 | $84.00 | $2.70 | 40% | — source file |
Outpatient: lowest $12.95, median $21.95, highest $50.40 — a 3.9× difference within the same market.
As an inpatient, the same code is billed by 6 facilities here, median $38.70. 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 5 of 6 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.
1 row held back from this comparison
It is priced below $1 or below a tenth of the national median for code 84100 ($42.25). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| Landmark Medical Center Woonsocket, RIHc Assay Of Inorganic Phosphorus | $4.00 | file |