- Bernard & Millie Duker Childrens Hospital at Albany Medical Center
- Bertrand Chaffee Hospital
- Berwick Hospital Center
- Bethany Childrens Health Center
- Bethesda Butler Hospital
- Bethesda Hospital East
- Bethesda Hospital West
- Bethesda North Hospital
- Bethesda Rehabilitation Hospital
- Beth Israel Deaconess Hospital - Milton
- Beth Israel Deaconess Hospital - Needham
- Beth Israel Deaconess Hospital - Plymouth
- Beth Israel Deaconess Medical Center
- Betsy Johnson Hospital
- Beverly Hospital
- BHC Alhambra Hospital
- Bibb Medical Center
- Bienville Medical Center
- Big Bend Regional Medical Center
- Bigfork Valley Hospital
- Big Horn Hospital Association
- Big Sandy Medical Center
- Big South Fork Medical Center
- Big Spring State Hospital
- Billings Clinic Broadwater
- Billings Clinic Hospital
- Bingham Memorial Hospital
- Bitterroot Health - Daly Hospital
- Black Hills Surgical Hospital
- Black River Memorial Hospital