ER Wait Times in Wyoming: 22 Hospitals Compared
22 hospitals in Wyoming report how long their emergency room patients stay. The middle value here is 120 minutes; national (Medicare): 162 minutes.
What this time means
Each hospital’s number is Medicare measure OP-18b: the median (middle) time from arriving at the emergency room to leaving it, for patients who were treated and went home. Half of these patients left sooner, half later. It is not the time before seeing a doctor, and it leaves out patients who were admitted to the hospital, transferred, or seen for mental health.
Medicare’s name for the measure: “Average (median) time patients spent in the emergency department before leaving from the visit, excluding patients transferred to another facility or psychiatric care/mental health patients. A lower number of minutes is better”. Patients seen October 2024 to September 2025.
Emergency rooms in Wyoming, shortest time first
Ranked by Medicare's median time (OP-18b), shortest first; hospitals with the same time share a rank. Left without being seen: share of ER patients who left before a doctor or nurse saw them (January 2024 to December 2024; national 2%). ER volume: patients per year, as Medicare groups it.
| # | Hospital | City | Median time in the ER | Left without being seen | ER volume |
|---|---|---|---|---|---|
| 1 | North Big Horn Hospital District | Lovell | 58 min | 0% | Low (under 20,000) |
| 2 | South Big Horn County Hospital | Basin | 80 min (1 h 20 min)† | 0% | Low (under 20,000) |
| 3 | Powell Valley Hospital | Powell | 83 min (1 h 23 min) | 0% | Low (under 20,000) |
| 4 | Memorial Hospital of Carbon County | Rawlins | 103 min (1 h 43 min) | 0% | Low (under 20,000) |
| 5 | St Johns Medical Center | Jackson | 109 min (1 h 49 min) | 0% | Low (under 20,000) |
| 6 | Evanston Regional Hospital | Evanston | 110 min (1 h 50 min)† | 0% | Low (under 20,000) |
| 7 | South Lincoln Medical Center - CAH | Kemmerer | 111 min (1 h 51 min)† | 0% | Low (under 20,000) |
| 7 | Star Valley Medical Center | Afton | 111 min (1 h 51 min) | Not reported | — |
| 9 | Memorial Hospital of Converse County | Douglas | 114 min (1 h 54 min) | 1% | Low (under 20,000) |
| 9 | Sheridan Memorial Hospital | Sheridan | 114 min (1 h 54 min) | 0% | Low (under 20,000) |
| 11 | Community Hospital | Torrington | 120 min (2 h) | 0% | Low (under 20,000) |
| 11 | Washakie Medical Center | Worland | 120 min (2 h) | 0% | Low (under 20,000) |
| 13 | Platte County Hospital | Wheatland | 123 min (2 h 3 min) | 1% | Low (under 20,000) |
| 14 | Crook County Hospital | Sundance | 130 min (2 h 10 min) | Not reported | — |
| 15 | Cody Regional Health | Cody | 138 min (2 h 18 min) | Not reported | — |
| 16 | Ivinson Memorial Hospital | Laramie | 142 min (2 h 22 min) | 0% | Low (under 20,000) |
| 17 | Sagewest Health Care | Riverton | 145 min (2 h 25 min) | 2% | Low (under 20,000) |
| 18 | Hot Springs County Memorial Hospital | Thermopolis | 148 min (2 h 28 min) | 0% | Low (under 20,000) |
| 19 | Memorial Hospital Sweetwater County | Rock Springs | 150 min (2 h 30 min)† | 1% | Low (under 20,000) |
| 20 | Campbell County Health | Gillette | 180 min (3 h) | 1% | Medium (20,000–39,999) |
| 21 | Banner Wyoming Medical Center | Casper | 190 min (3 h 10 min) | 2% | Medium (20,000–39,999) |
| 22 | Cheyenne Regional Medical Center | Cheyenne | 191 min (3 h 11 min) | 1% | Medium (20,000–39,999) |
† Medicare footnote 3: the result is based on a shorter period than required.
Common questions
Which ER in Wyoming has the shortest wait?
In Medicare's data for October 2024 to September 2025, North Big Horn Hospital District had the shortest median time patients spent in the emergency room before going home: 58 minutes. This is the total time of the visit, not the time before seeing a doctor, and it is an average of past patients, not a promise for your visit.
What is the average ER wait time in Wyoming?
The middle value of the 22 hospitals listed here is 120 minutes. The national figure published by Medicare is 162 minutes. Each hospital's number is the median time from arriving at the emergency room to leaving it, for patients who were treated and went home.
Should I drive to a farther ER to wait less?
No. In an emergency, call 911 or go to the nearest emergency room. These times are past averages; emergency rooms see the sickest patients first, and minutes lost on the road can matter more than minutes in a waiting room.
Does a shorter time mean a better emergency room?
Not by itself. Busier emergency rooms and hospitals that treat more serious cases usually have longer times, so the ER volume is shown next to each time. The time is one measure among many on each hospital’s page.
Sources and dates
- Timely and Effective Care - Hospital — Centers for Medicare & Medicaid Services (CMS), data updated July 22, 2026, retrieved October 31, 2026. Times: patients seen October 2024 to September 2025; left without being seen: January 2024 to December 2024.
- Timely and Effective Care - National — CMS, data updated July 22, 2026 (the national figures).
Only open hospitals that list an emergency room and report this time are included. The state and city figures are the median of the hospitals listed, calculated by us from the same CMS hospital file. Wording last revised November 11, 2026. Not medical advice.