| All Children's Hospital | St. Petersburg | FL |
| Arkansas Children's | Little Rock | AR |
| Arnold Palmer Hospital for Children | Orlando | FL |
| Arnot Ogden Medical Center | Elmira | NY |
| Aurora Health Care | Milwaukee | WI |
| Banner Health | Phoenix | AZ |
| Beloit Clinic | Beloit | WI |
| BJC Healthcare | St. Louis | MO |
| CATCH Community Access | York | NE |
| Children's Hospital & Medical Center | Seattle | WA |
| Children's Hospital of Alabama University of Alabama Hospital |
Birmingham | AL |
| Children's Hospital of Philadelphia | Philadelphia | PA |
| Children's Hospital of the King's Daughter | Norfolk | VA |
| Children's Physicians Network | Minnetonka | MN |
| Clarian Health | Indianapolis | IN |
| Community Health Plan - Heartland Health | St. Joseph | MO |
| Company Nurse On-Call | Scottsdale | AZ |
| Consult-A-Nurse Helathcare Referral | Fort Myers | FL |
| Cook Children's Medical Center | Fort Worth | TX |
| Coventry Healthcare | San Diego | CA |
| Denver Health | Denver | CO |
| EPIC Management | Redlands | CA |
| Erlanger Health System | Chattanooga | TN |
| Evergreen Helathcare | Kirkland | WA |
| FONEMED | Colorado Springs | CO |
| Goshen Health System | Goshen | IN |
| HCA Midwest | Kansas City | MO |
| Kosair Children's Hospital | Louisville | KY |
| Legacy Health System | Portland | OR |
| Lifespan | Providence | RI |
| Marshfield Clinic | Marshfield | WI |
| Mercy Hospital Medical Center | Des Moines | IA |
| Methodist Healthcare | San Antonio | TX |
| Molina Healthcare, Inc. | Long Beach | CA |
| North Idaho Family Physicians | Coeur D' Alene | ID |
| Northeast Georgia Medical Center | Gainesville | GA |
| Orange County Foundation for Medical Care | Orange | CA |
| Prevea Health Network | Green Bay | WI |
| ProHealth Care | Waukesha | WI |
| ProMedica Continuing Care Services | Toledo | OH |
| Providence Health and Services | Beaverton | OR |
| Rady Children's Hospital | San Diego | CA |
| Seton Family of Hospitals | Austin | TX |
| St. Joseph's Children's Hospital | Paterson | NJ |
| St. Joseph's Health System | Stockton | CA |
| St. Luke's Regional Medical Center | Boise | ID |
| St. Mary's-Duluth Clinic | Duluth | MN |
| St. Peter's Medical Center | New Brunswick | NJ |
| T.C. Thompson's Children's Hospital | Chattanooga | TN |
| Team Health Medical Call Center | Knoxville | TN |
| Texas Children's Hospital | Houston | TX |
| Texas Health Resources | Arlington | TX |
| The Children's Hospital | Denver | CO |
| Thedacare | Appleton | WI |
| Triage Logic | Winston-Salem | NC |
| United Health Services | Johnson City | NY |
| University of Arkansas Medical Sciences | Little Rock | AR |
| University of Kentucky Hospital | Lexington | KY |
| University of North Carolina | Chapel Hill | NC |
| Park Nicollet Health Services | St. Louis | MN |