| Abbreviation | Definition |
|---|---|
| APTA | American Physical Therapy Association |
| APTC | Advanced Physical Therapy Center |
| APTG | Aarhus Particle Therapy Group |
| APTG | Atlantis Physical Therapy Group |
| APTT | Associate Partner Trauma Therapist |
| APWT | Acoustic Pressure Wound Therapy |
| ART | antiretroviral therapy Treatment |
| ARTC | Adult Recreation Therapy Centre |
| ASGT | American Society of Gene Therapy |
| ASHT | American Society of Hand Therapy |
| ASMT | Advanced School of Massage Therapy |
| ASMT | Assessment |
| ASNTR | American Society for Neural Therapy and Repair |
| ASNTR | American Society of Neural Therapy and Repair |
| ASPT | Advanced Spine Physical Therapy |
| ATAO | Art Therapy Association of Oklahoma |
| ATCS | Art Therapy Certified Supervisor |
| ATIMP | Advanced Therapy Investigational Medicinal Products |
| ATMP | Advanced Therapy Medicinal Product |
| ATMP | Advanced Therapy Medicinal Products |