| Abbreviations | Meaning |
 | APC | Ambulatory Payment Classification |
 | APC | Association Of Prosthodontists Of Canada. Association Des Prosthodontistes Du Canada |
 | APC / CLA | Association Pulmonaire Du Canada / Canadian Lung Association |
 | APC / CPA | Association Des Psychiatres Du Canada / Canadian Psychiatric Association |
 | APCAB | Asia Pacific Continence Advisory Board |
 | APCC | Animal Poison Control Center |
 | APCQI | Association De La Paralysie Cérébrale Du Québec Inc. |
 | APD | Association Of Professors Of Dermatology |
 | APD | Australian Private Doctor [periodical] |
 | APDA | American Parkinson Disease Association |
 | APDHES | Association Pour La Promotion Du Droit Hospitalier Et De L'Économie De La Santé |
 | APDIM | Association Of Program Directors In Internal Medicine |
 | APDR | Association Of Program Directors In Radiology |
 | APDVS | Association Of Program Directors In Vascular Surgery |
 | APEAAS | Association Pour Enfants Et Adultes Déficients Sensoriels |
 | APEC | Asian Pacific Endodontic Confederation |
 | APEE / AEPE | Association For Paediatric Education In Europe / Association Pour L'Enseignement De La Pédiatrie En Europe |
 | APEHA | Association Des Parents D'Enfants Atteints D'Hémiplégie Alternante |
 | APEI | Association De Parents Et Amis De Personnes Handicapées Mentales |
 | APERSI | Association Pour L'Expertise Et La Recherche En Soins Infirmiers |
 | APES | Association Des Pharmaciens Des Établissements De Santé Du Québec |
 | APESM | Australasian Physical & Engineering Sciences In Medicine [journal] |
 | APESOM | Association Des Pharmaciens Des Établissements De Santé De L'Outre-Mer |
 | APF | American Pain Foundation |
 | APF | American Porphyria Foundation |
 | APF | American Psychiatric Foundation |
 | APF | American Psychoanalytic Foundation |
 | APF | Association Des Paralysés De France |
 | APF | Association Psychanalytique De France |
 | APGNN | Association Of Pediatric Gastroenterology And Nutrition Nurses |
 | APH | American Printing House For The Blind |
 | APHA | Alberta Public Health Association |
 | APHA | American Pharmacists Association |
 | APHA | American Public Health Association |
 | APHA | Australian Private Hospitals Association |
 | APHAL | Association Des Pharmaciens Hospitaliers D'Alsace Et De Lorraine |
 | APHC / CPHA | Association Des Pharmaciens Du Canada / Canadian Pharmacists Association |
 | APHIF | Association De Pharmacie Hospitalière De L'Ile De France |
 | APHIN | Animal Productivity And Health Information Network |
 | APHIS | Animal And Plant Health Inspection Service. U. S. Department Of Agriculture |
 | APHM | Association Pharmacie Hospitalière Et Médicaments |
 | APHMG | Association Of Professors Of Human And Medical Genetics |
 | APHN | Asia Pacific Hospice Palliative Care Network |
 | APHNEP | Association De Pharmacie Hospitalière De La Région Nord Et Pas De Calais |
 | APHO | Association De La Pharmacie Hospitalière De L'Ouest |
 | APHO | Association Of Public Health Observatories |
 | APHON | Association Of Pediatric Hematology/Oncology Nurses |
 | APHRU | Alcohol & Public Health Research Unit |
 | APHS | American Pseudo-obstruction And Hirschsprung's Disease Society |
 | API | Association Des Pharmaciens De L'Industrie |