- Capital Medical Center
- Cascade Valley Hospital/Clinics
- Columbia Basin Hospital
- Columbia County Health System
- Confluence Health
- Coulee Medical Center
- East Adams Rural Hospital
- Evergreen Health
- Forks Community Hospital
- Franciscan Health System
- Harrison Medical Center
- Highline Medical Center
- St. Anthony Hospital
- St. Clare Hospital
- St. Elizabeth Hospital
- St. Francis Hospital
- St. Joseph Hospital
- Garfield County Public Hospital
- Grays Harbor Community Hospital
- Kaiser Permanente (Group Health Cooperative)
- Island Hospital
- Jefferson Healthcare
- Kadlec Regional Medical Center
- Kittitas Valley Healthcare
- Lake Chelan Community Hospital
- Lincoln Hospital
- Mid-Valley Hospital
- Mason General Hospital
- Morton General Hospital
- Multicare Health System
- Allenmore Hospital
- Auburn Medical Center
- Good Samaritan Hospital
- Mary Bridge Children’s Hospital
- Tacoma General Hospital
- Newport Hospital & Health Services
- North Sound Emergency Medical
- North Valley Hospital
- Ocean Beach Hospital
- Odessa Memorial
- Olympic Medical Center
- Othello Community Hospital
- Overlake Hospital
- PeaceHealth Columbia Network
- Southwest Medical Center
- St. John Medical Center
- PeaceHealth Northwest Network
- Island Medical Center
- St. Joseph Medical Center
- United General Medical Center
- Prosser Memorial Hospital
- Providence Healthcare Eastern WA
- Holy Family Hospital
- Sacred Heart Medical Center & Children’s Hospital
- Mt. Carmel Hospital
- St. Joseph Hospital
- Providence Regional Medical Center Everett
- Providence Healthcare SW
- Centralia Hospital
- St. Peter Hospital
- Pullman Regional Hospital
- Quincy Valley Medical Center
- Samaritan Hospital
- Seattle Children’s Hospital
- Skagit Valley Hospital
- Skyline Hospital
- Snoqualmie Valley Hospital
Summit Pacific Medical Center - Toppenish Community Hospital
- Tri-State Memorial Hospital
- Three Rivers Hospital
- Trios Health
- UW Medicine
- Harborview Medical Center
- UW Medical Center
- Northwest Medical Center
- Valley Medical Center
- Virginia Mason Medical Center
- Walla Walla General Hospital
- Whidbey General Hospital
- Whitman Hospital
- Willapa Harbor Hospital
- Yakima Memorial Hospital
Yakima Regional Medical & Cardiac Center