Final answer:
The National Medical Association created the National Hospital Association in 1923 to improve professionalism and prevent Black hospitals from closing.
Step-by-step explanation:
The organization that began in the 1920s is the National Medical Association (NMA). In 1923, as part of its efforts to enhance the professionalization and standards within the Black medical profession, the NMA established the National Hospital Association.
The association focused on improving training, organizing conferences, writing recommendations on hospital administration, and publishing articles regarding Black medical advances in their journal. This initiative was crucial in preventing Black hospitals from closing and advancing the state of healthcare for African Americans during a time of segregation and limited access to quality medical care.