| AAPA | American Academy of Physician Assistants; American Association of Pathologist Assistants |
|---|---|
| AAPS | American Association of Plastic Surgeons; Arizona Articulation Proficiency Scale; Association of Ame... |
| AART | American Association for Rehabilitation Therapy; American Association for Respiratory Therapy |
| AAS | Aarskog-Scott [syndrome]; acid aspiration syndrome; alcoholic abstinence syndrome; American Academy ... |
| ACHE | American College of Healthcare Executives; American Council for Headache Education |