| Abbreviation | Definition |
|---|---|
| ACT | Abuse Counseling and Treatment |
| ACT | Appointment Change and Termination |
| ACTFAST | Agent Characteristics, Toxicology, First Aid, and Special Treatment |
| ACTS | Acute Care and Traffic Safety |
| ACTT | Assertive Community Treatment Team |
| ACU | Ambulatory Care Unit |
| ACUV | Air Contrast Ultrasonographic Venography |
| ACWH | Aspen Center for Women's Health, Inc. |
| AD | Admission and Discharge |
| AD | Amoebic Dysentery |
| AD | As Directed |
| ADACS | Antenatal Diagnosis And Counselling Service |
| ADAP | AIDS Drug Assistance Program |
| ADAP | Alcohol and Drug Abuse Program |
| ADAPT | Adaptive Developmentally-Appropriate Practice Theory |
| ADAPT | Antitrypsin Deficiency Assessment and Programme for Treatment |
| ADATP | Alcohol and Drug Abuse Treatment Program |
| ADC | Ambulance Dispatch Center |
| ADDM | Autism and Developmental Disabilities Monitoring |
| ADDTC | Alzheimers Disease Diagnostic and Treatment Center |