• Academy of Medical Sciences promotes medical science across traditional disciplinary boundaries.

• American Academy of Ambulatory Care, Inc. membership organization dedicated to ambulatory and acute care research, education, and professional growth.

• American Academy of HIV Medicine (AAHIVM) supports specialists providing care for people with HIV/AIDS. Includes patient information resources and referral database.

• American Academy of Hospice and Palliative Medicine association of physicians dedicated to the advancement of hospice and palliative medicine practice, education, and research.

• American Back Society

• American College of Occupational and Environmental Medicine

• American College of Rheumatology official organization for doctors and health professionals who treat arthritis and other rheumatic diseases.

• American Medical Directors Association

• American Medical Technologists offers certification for laboratory technicians, medical assistants, phlebotomists, and dental assistants.

• American Professional Practice Association nonprofit association for professionals in the medical and dental areas that offers services in various insurances, loans, discounts, and relocation amoung its many programs.

• American Society for Bone and Mineral Research scientific society composed of individuals actively involved in clinical and basic aspects of bone and mineral metabolism.

• American Society for Clinical Laboratory Science (ASCLS) promotes all aspects of diagnostic medicine practice.

• American Society of Bariatric Physicians national medical society of licensed physicians offering specialized programs in the medical treatment of obesity (bariatrics), weight loss, and dieting.

• American Society of Transplantation

• Association of American Indian Physicians dedicated to excellence in Native American healthcare by promoting education in the medical disciplines, honoring traditional healing practices and restoring the balance of mind, body, and spirit.

• Association of American Physicians details publications, meetings, and more.

• Association of Philippine Physicians in America (APPA) strives to integrate Filipino physicians with collegues in America, and maintain recognition of their culture and issues.

• Centre for Evidence-Based Medicine (NHS R&D) site includes The EBM Toolbox, teaching materials, searching hints, and much more.

• Colegio Oficial de Medicos de Santa Cruz de Tenerife

• Colorado Foundation for Medical Care - CFMC not for profit medical peer review organization.