All 50 states are represented in the House of Delegates (HOD), along with the District of Columbia, Guam, Puerto Rico and the Virgin Islands.

Other groups entitled to a seat(s) in the HOD are:

Federal services

• U.S. Air Force
• U.S. Army
• U.S. Department of Veterans Affairs
• U.S. Navy
• U.S. Public Health Service

National medical specialty societies

• Academy of Physicians in Clinical Research
• Aerospace Medical Association
• AMDA—The Society for Post-acute and Long-term Care Medicine
• American Academy of Allergy, Asthma and Immunology
• American Academy of Child and Adolescent Psychiatry
• American Academy of Cosmetic Surgery
• American Academy of Dermatology
• American Academy of Facial Plastic and Reconstructive Surgery
• American Academy of Family Physicians
• American Academy of Hospice and Palliative Medicine
• American Academy of Insurance Medicine
• American Academy of Neurology
• American Academy of Ophthalmology
• American Academy of Orthopaedic Surgeons
• American Academy of Otolaryngic Allergy Inc. 
• American Academy of Otolaryngology—Head and Neck Surgery
• American Academy of Pain Medicine
• American Academy of Pediatrics
• American Academy of Physical Medicine and Rehabilitation
• American Academy of Psychiatry and the Law
• American Academy of Sleep Medicine
• American Association for Geriatric Psychiatry 
• American Association for Hand Surgery
• American Association for Thoracic Surgery
• American Association of Clinical Endocrinologists
• American Association of Clinical Urologists, Inc. 
• American Association of Gynecologic Laparoscopists
• American Association of Neurological Surgeons
• American Association of Neuromuscular & Electrodiagnostic Medicine
• American Association of Plastic Surgeons
• American Association of Public Health Physicians
• American Clinical Neurophysiology Society
• American College of Allergy, Asthma and Immunology
• American College of Cardiology
• American College of Chest Physicians (CHEST)
• American College of Emergency Physicians
• American College of Gastroenterology
• American College of Legal Medicine
• American College of Medical Genetics and Genomics
• American College of Medical Quality
• American College of Mohs Surgery
• American College of Nuclear Medicine
• American College of Obstetricians and Gynecologists
• American College of Occupational and Environmental Medicine
• American College of Physicians
• American College of Preventive Medicine
• American College of Radiation Oncology
• American College of Radiology
• American College of Rheumatology
• American College of Surgeons
• American Gastroenterological Association
• American Geriatrics Society
• American Institute of Ultrasound in Medicine
• American Orthopaedic Association
• American Orthopaedic Foot and Ankle Society
• American Psychiatric Association
• American Rhinologic Society
• American Roentgen Ray Society
• American Society for Aesthetic Plastic Surgery, Inc. 
• American Society for Clinical Pathology
• American Society for Dermatologic Surgery
• American Society for Gastrointestinal Endoscopy
• American Society for Metabolic and Bariatric Surgery
• American Society for Radiation Oncology
• American Society for Reconstructive Microsurgery
• American Society for Reproductive Medicine
• American Society for Surgery of the Hand
• American Society of Abdominal Surgeons
• American Society of Addiction Medicine
• American Society of Anesthesiologists
• American Society of Breast Surgeons
• American Society of Cataract and Refractive Surgery
• American Society of Colon and Rectal Surgeons
• American Society of Cytopathology
• American Society of Dermatopathology
• American Society of Echocardiography
• American Society of General Surgeons
• American Society of Hematology
• American Society of Interventional Pain Physicians
• American Society of Maxillofacial Surgeons
• American Society of Neuroimaging
• American Society of Neuroradiology
• American Society of Nuclear Cardiology
• American Society of Ophthalmic Plastic and Reconstructive Surgery
• American Society of Plastic Surgeons
• American Society of Retina Specialists
• American Society of Transplant Surgeons
• American Thoracic Society
• American Urological Association
• American Vein and Lymphatic Society
• Association for Clinical Oncology
• Association of Military Surgeons of the United States
• Association of University Radiologists
• College of American Pathologists
• Congress of Neurological Surgeons
• Contact Lens Association of Ophthalmologists
• Heart Rhythm Society
• Infectious Diseases Society of America
• International Academy of Independent Medical Evaluators
• International College of Surgeons: U.S. Section
• International Society for the Advancement of Spine Surgery
• International Society of Hair Restoration Surgery
• National Association of Medical Examiners
• North American Neuromodulation Society
• North American Neuro-Ophthalmology Society
• North American Spine Society
• Obesity Medicine Association
• Radiological Society of North America
• Renal Physicians Association
• Society for Cardiovascular Angiography and Interventions
• Society for Investigative Dermatology, Inc. 
• Society for Vascular Surgery
• Society of American Gastrointestinal Endoscopic Surgeons
• Society of Cardiovascular and Computed Tomography
• Society of Critical Care Medicine
• Society of Hospital Medicine
• Society of Interventional Radiology
• Society of Nuclear Medicine and Molecular Imaging
• Society of Thoracic Surgeons
• Spine Intervention Society
• The Endocrine Society
• The Society of Laparoscopic and Robotic Surgeons
• The Triological Society
• Undersea and Hyperbaric Medical Society
• United States and Canadian Academy of Pathology

Other national medical associations

• American Medical Women’s Association
• American Osteopathic Association
• National Medical Association

Professional interest medical associations

• American Association of Physicians of Indian Origin
• American Medical Group Association
• GLMA

Sections and groups

• Academic Physicians Section
• Integrated Physician Practice Section
• International Medical Graduates Section
• Medical Student Section
• Minority Affairs Section
• Organized Medical Staff Section
• Resident and Fellow Section
• Senior Physicians Section
• Young Physicians Section
• Women Physicians Section