| HCA Healthcare | HealthTrust | Nashville, TN | 184 | Alabama, Alaska, California, Colorado, Florida, Georgia, Idaho, Indiana, Kansas, Kentucky, Louisiana, Missouri, Nevada, New Hampshire, North Carolina, South Carolina, Tennessee, Texas, Utah, Virginia |
| Veterans Health Administration | Varies | Washington, D.C. | 172 | Nationwide (serving all states) |
| CommonSpirit Health | GHX | Chicago, IL | 140 | Arizona, Arkansas, California, Colorado, Georgia, Iowa, Indiana, Kentucky, Minnesota, Nebraska, Nevada, New Mexico, North Dakota, Ohio, Oregon, Pennsylvania, Tennessee, Texas, Washington, Wisconsin |
| Ascension | SYMPLR | St. Louis, MO | 140 | Alabama, Florida, Georgia, Illinois, Indiana, Kansas, Louisiana, Maryland, Michigan, Mississippi, Missouri, New York, Oklahoma, Tennessee, Texas, Wisconsin |
| LifePoint Health | Varies | Brentwood, TN | 124 | Alabama, Arizona, Colorado, Georgia, Idaho, Kansas, Kentucky, Louisiana, Michigan, Mississippi, Montana, Nevada, New Hampshire, New Mexico, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, West Virginia |
| ScionHealth | Varies | Louisville, KY | 94 | Arizona, Arkansas, California, Colorado, Florida, Georgia, Illinois, Indiana, Kansas, Kentucky, Louisiana, Mississippi, Missouri, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia |
| Community Health Systems | GHX | Franklin, TN | 71 | Alabama, Alaska, Arizona, Arkansas, California, Florida, Georgia, Illinois, Indiana, Kentucky, Mississippi, Missouri, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, Washington, West Virginia |
| Advocate Health | SYMPLR | Charlotte, NC | 68 | Georgia, Illinois, North Carolina, South Carolina, Wisconsin |
| AdventHealth | GHX | Altamonte Springs, FL | 50+ | Colorado, Florida, Georgia, Illinois, Kansas, Kentucky, North Carolina, Texas, Wisconsin |
| Providence | Varies | Renton, WA | 51 | Alaska, California, Montana, New Mexico, Oregon, Texas, Washington |
| Baylor Scott & White Health | Green Security | Dallas, TX | 51 | Texas |
| Sanford Health | Varies | Sioux Falls, SD | 46 | Iowa, Minnesota, Nebraska, North Dakota, South Dakota |
| Kaiser Permanente | GHX | Oakland, CA | 40 | California, Colorado, Georgia, Hawaii, Maryland, Oregon, Virginia, Washington, Washington D.C. |
| UPMC (University of Pittsburgh Medical Center) | | Pittsburgh, PA | 40 | Maryland, New York, Pennsylvania |
| UnityPoint Health | Varies | West Des Moines, IA | 32 | Illinois, Iowa, Wisconsin |
| Avera Health | Varies | Sioux Falls, SD | 37 | Iowa, Minnesota, Nebraska, North Dakota, South Dakota |
| Prime Healthcare | Varies | Ontario, CA | 45 | Alabama, California, Florida, Georgia, Indiana, Kansas, Michigan, Missouri, Nevada, New Jersey, New Mexico, Ohio, Pennsylvania, Rhode Island, Texas, West Virginia |
| Atrium Health | GHX | Charlotte, NC | 40+ | North Carolina, South Carolina, Georgia, Alabama |
| Adventist | Green Security | Roseville, CA | 53 | California, Oregon, Hawaii, Washington |