American Association for Respiratory Care - An association for respiratory care professionals and allied health specialists interested in cardiopulmonary care.
https://www.aarc.org/
Lehigh Valley Respiratory Care - Specializes in oxygen and respiratory care equipment and services.
https://www.lvrc.com/
National Board for Respiratory Care Inc - Offers voluntary credentialing examinations for practitioners of respiratory therapy and pulmonary function Technology.
https://www.nbrc.org/
