Prices at 19 hospitals in Idaho, from their machine-readable files. Here the median cash price is $30 — 25% below the US median ($41), roughly 6.4× the Medicare rate.
Lowest cash prices
| Hospital | Location | Cash | Insurer | CMS rating | ER wait | Readmit |
|---|---|---|---|---|---|---|
| Treasure Valley Hospital | Boise, ID | $14 | $64 | — | — | 14.8% |
| Gritman Medical Center | Moscow, ID | $27 | $12 | ★ 3/5 | 128 min | 15.1% |
| St Lukes Magic Valley Medical Center | Twin Falls, ID | $29 | $19 | ★ 4/5 | 184 min | 14.3% |
| St Luke's Regional Medical Center | Boise, ID | $29 | $18 | ★ 5/5 | 168 min | 12.4% |
| St Luke's Nampa Medical Center | Nampa, ID | $29 | $18 | ★ 5/5 | 157 min | 13.9% |
| St Luke's Jerome | Jerome, ID | $29 | $19 | — | 101 min | 14.8% |
| St Luke's Elmore Medical Center | Mountain Home, ID | $29 | $18 | ★ 5/5 | 113 min | 15.1% |
| St Luke's McCall | Mccall, ID | $29 | $21 | — | 147 min | 14.8% |
| St Luke's Wood River Medical Center | Ketchum, ID | $29 | $20 | ★ 4/5 | 141 min | 14.9% |
| North Canyon Medical Center | Gooding, ID | $30 | $16 | — | 111 min | 14.9% |
| Mountain View Hospital | Idaho Falls, ID | $42 | $5 | ★ 3/5 | 115 min | 14.8% |
| Idaho Falls Community Hospital, Llc | Idaho Falls, ID | $42 | $5 | ★ 4/5 | 137 min | 14.6% |
| Power County Hospital District | American Falls, ID | $46 | — | — | 86 min | — |
| Kootenai Health | Coeur D'alene, ID | $56 | $13 | ★ 4/5 | 176 min | 14.0% |
| Portneuf Medical Center | Pocatello, ID | $65 | $92 | ★ 4/5 | 218 min | 13.8% |
| Franklin County Medical Center | Preston, ID | $75 | $29 | ★ 3/5 | 188 min | 14.4% |
| Northwest Specialty Hospital | Post Falls, ID | $107 | $5 | — | — | 13.7% |
| West Valley Medical Center | Caldwell, ID | $126 | $10 | ★ 5/5 | 131 min | 15.1% |
| Eastern Idaho Regional Medical Center | Idaho Falls, ID | $316 | $137 | ★ 3/5 | 132 min | 12.9% |
CMS rating = overall hospital star rating (1–5); ER wait = median minutes in the emergency department; Readmit = 30-day readmission rate (lower is better) — all from Medicare’s Care Compare; “—” = not reported. Data last updated August 2026. Prices from hospitals’ machine-readable files (45 CFR §180); Medicare benchmark from CMS PFS/CLFS/IPPS. Prices below 15% of the median are excluded as likely partial or mis-coded charges. Estimates — confirm with the hospital. Report an incorrect price.
Price comparison (median)
Typical cash price here is $30 — about 6.4× the Medicare rate ($5). High vs Medicare. A fair cash price is usually within ~2× Medicare ($9).
💡 Asking for the cash price instead of the $42 list price could save about $12 (28%).
Rough estimate from this procedure’s median insurer-negotiated rate. Your actual cost depends on your plan — confirm with your insurer.
By city
Phosphorus blood test cost in other states
All Phosphorus blood test prices (national) → · All hospitals in Idaho →