Prices at 15 hospitals in Connecticut, from their machine-readable files. Here the median cash price is $89 — about the US median ($90), roughly 6.1× the Medicare rate.
Lowest cash prices
| Hospital | Location | Cash | Insurer | CMS rating | ER wait | Readmit |
|---|---|---|---|---|---|---|
| Connecticut Childrens Medical Center | Hartford, CT | $37 | $46 | — | — | — |
| Charlotte Hungerford Hospital | Torrington, CT | $46 | $15 | ★ 3/5 | 150 min | 16.1% |
| St Francis Hospital & Medical Center | Hartford, CT | $53 | $17 | ★ 2/5 | 275 min | 14.8% |
| Johnson Memorial Hospital | Stafford Springs, CT | $53 | $31 | ★ 3/5 | 178 min | 16.0% |
| Saint Mary's Hospital | Waterbury, CT | $53 | $17 | ★ 3/5 | 267 min | 15.5% |
| Bridgeport Hospital | Bridgeport, CT | $77 | $41 | ★ 4/5 | 134 min | 15.6% |
| Greenwich Hospital Association | Greenwich, CT | $78 | $46 | ★ 5/5 | 177 min | 14.7% |
| Yale-New Haven Hospital | New Haven, CT | $89 | $48 | ★ 5/5 | 204 min | 14.2% |
| Bristol Hospital | Bristol, CT | $93 | $21 | ★ 2/5 | 194 min | 16.0% |
| William W Backus Hospital | Norwich, CT | $121 | $15 | ★ 4/5 | 166 min | 14.4% |
| Hartford Hospital | Hartford, CT | $121 | $15 | ★ 4/5 | 281 min | 15.5% |
| Midstate Medical Center | Meriden, CT | $121 | $15 | ★ 4/5 | 223 min | 14.9% |
| Windham Community Memorial Hospital | Willimantic, CT | $121 | $15 | ★ 3/5 | 144 min | 15.2% |
| The Hospital of Central Connecticut | New Britain, CT | $121 | $15 | ★ 2/5 | 161 min | 14.6% |
| St Vincent's Medical Center | Bridgeport, CT | $122 | $15 | ★ 4/5 | 230 min | 14.0% |
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 June 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 $89 — about 6.1× the Medicare rate ($15). High vs Medicare. A fair cash price is usually within ~2× Medicare ($29).
💡 Asking for the cash price instead of the $121 list price could save about $33 (27%).
Rough estimate from this procedure’s median insurer-negotiated rate. Your actual cost depends on your plan — confirm with your insurer.
By city
Ammonia blood test cost in other states
All Ammonia blood test prices (national) → · All hospitals in Connecticut →