| Abbreviations | Meaning |
 | ACHE | American Council For Headache Education |
 | ACHED | Asociación Chilena Para El Estudio Del Dolor |
 | ACHI | Association For Community Health Improvement |
 | ACHM | American College Of Hyperbaric Medicine |
 | ACHN / CAHN | Association Canadienne Pour L'Histoire Du Nursing / Canadian Association For The History Of Nursing |
 | ACHNE | Association Of Community Health Nursing Educators |
 | ACHPER | Australian Council For Health, Physical Education And Recreation |
 | ACHRN | Advanced Certified Hyperbaric Registered Nurse |
 | ACHS | Australian Council On Healthcare Standards |
 | ACHSA | American Correctional Health Services Association |
 | ACHSE | Australian College Of Health Service Executives |
 | ACI INTERNATIONAL | Allergy & Clinical Immunology Interntional [periodical] |
 | ACIA | Association Des Cadres Infirmiers Angevins |
 | ACIA | Association Des Cadres Infirmiers D'Aquitaine |
 | ACIA / CFIA | Agence Canadienne D'Inspection Des Aliments / Canadian Food Inspection Agency |
 | ACIGEPV | Association Des Cadres Infirmiers En Gérontologie Des Établissements Publics De Vendée |
 | ACIIS / CANAC | Association Canadienne Des Infirmières Et Infirmiers En Sidologie / Canadian Association Of Nurses In AIDS Care |
 | ACIISN / CANN | Association Canadienne Des Infirmières Et Infirmiers En Sciences Neurologiques / Canadian Association Of Neuroscience Nurses |
 | ACIO / CANO | Association Canadienne Des Infirmières En Oncologie / Canadian Association Of Nurses In Oncology |
 | ACIP | Advisory Committee On Immunization Practices |
 | ACIP | Association Des Cadres De L'Industrie Pharmaceutique |
 | ACISM | Association Des Cadres Infirmiers En Santé Mentale |
 | ACISU / ACAHO | Association Canadienne Des Institutions De Santé Universitaire / Association Of Canadian Academic Healthcare Organizations |
 | ACITN / CANNT | Association Canadienne Des Infirmières Et Infirmiers Et Des Technologues De Néphrologie / Canadian Association Of Nephrology Nurses And Technologists |
 | ACKD | Advances In Chronic Kidney Disease [periodical] |
 | ACLAD | American Committee On Laboratory Animal Diseases |
 | ACLAM | American College Of Laboratory Animal Medicine |
 | ACLM | American College Of Legal Medicine |
 | ACLM | Australian College Of Legal Medicine |
 | ACLPS | Academy Of Clinical Laboratory Physicians And Scientists |
 | ACM | Association Of Clinical Microbiologists |
 | ACMDP | Association Des Conseils Des Médecins, Dentistes Et Pharmaciens Du Québec |
 | ACMDTT | Alberta College Of Medical Diagnostic & Therapeutic Technologists |
 | ACME | Alliance For Continuing Medical Education |
 | ACMG | American College Of Medical Genetics |
 | ACMGF | American College Of Medical Genetics Foundation |
 | ACMH | Association For Children's Mental Health |
 | ACMHA | American College Of Mental Health Administration |
 | ACMHS | Asian Community Mental Health Services |
 | ACMI | American College Of Medical Informatics |
 | ACML | Arab Centre For Medical Literature |
 | ACMP | American College Of Medical Physics |
 | ACMPD | American Council On Marijuana And Other Psychoactive Drugs |
 | ACMPE | American College Of Medical Practice Executives |
 | ACMQ | American College Of Medical Quality |
 | ACMR / CAIR | Association Canadienne Des Médecins Résidents / Canadian Association Of Internes And Residents |
 | ACMTS / CADTH | Agence Canadienne Des Médicaments Et Des Technologies De La Santé / Canadian Agency For Drugs And Technologies In Health |
 | ACMU / CAEP | Association Canadienne De Médecins D'Urgence / Canadian Association Of Emergency Physicians |
 | ACMV / CVMA | Association Canadienne Des Médecins Vétérinaires / Canadian Veterinary Medical Association |
 | ACN | American College Of Nutrition |