| 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 |
| ACN | acute conditioned neurosis; Ambulatory Care Network; American College of Neuropsychiatrists; America... |
| ACNM | American College of Nuclear Medicine; American College of Nurse-Midwives |