| Abbreviation | Definition |
|---|---|
| AASDT | Advanced Accredited Sexual Diversity Therapist |
| AAT | Advances in Alzheimer Therapy |
| AAT | Animal Assisted Therapy |
| AATA | American Art Therapy Association |
| AATT | Animal Assisted Therapy Team |
| ABATS | Autism Believe Accept Therapy Services |
| ABBP | Acceptance Based Behavioral Therapy |
| ABCT | American Board of Chelation Therapy |
| ABFT | Attachment Based Family Therapy |
| ABGT | Above and Beyond Group Therapy |
| ACIT | Achievable Community Interaction Therapy |
| ACMT | ABMP Certified Massage Therapist |
| ACMT | Alberta College of Massage Therapy |
| ACOTE | Accreditation Commission for Occupational Therapy Education |
| ACOTE | Accreditation Council for Occupational Therapy Education |
| ACOTE | Accrediting Council of Occupational Therapy Education |
| ACOTE | American Council for Occupational Therapy Education |
| ACPT | Attachment Core Pattern Therapy |
| ACRT | Adaptive Cardiac Resynchronisation Therapy |
| ACT | Acceptance and Commitment Therapy |