Phosphorus test cost in Spokane, WA — inpatient
In Spokane-Spokane Valley, WA, 4 hospitals list a cash price for phosphorus (phosphate) blood test as an inpatient: from $17.50 to $196.70, with a median of $50.40. The lowest listed price is at Providence Mount Carmel Hospital — $32.90 less than the median here. Across Washington, the median is $39.83 at 58 hospitals.
Cash prices at 4 facilities across 3 cities for code 84100, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 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 Spokane-Spokane Valley, WA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Providence Mount Carmel Hospital lowest Colville, WA · (509) 684-2561 HC ASSAY PHOSPHORUS File of Apr 1, 2026 · source file | $17.50 | $25.00 | — | 30% |
| Prov Sacred Hrt Medical Center & Childs Hospital Spokane, WA · (509) 474-3131 HC ASSAY PHOSPHORUS File of Apr 1, 2026 · source file | $45.50 | $65.00 | — | 30% |
| Providence St Joseph Hospital Chewelah, WA · (509) 935-8211 HC ASSAY PHOSPHORUS File of Apr 1, 2026 · source file | $55.30 | $79.00 | — | 30% |
| Providence Holy Family Hospital Spokane, WA · (509) 482-0111 HC ASSAY PHOSPHORUS File of Apr 1, 2026 · source file | $196.70 | $281.00 | — | 30% |
Inpatient: lowest $17.50, median $50.40, highest $196.70 — a 11.2× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $41.20 — that is the price to compare if you are not being admitted.
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.