| Abbreviation | Definition |
|---|---|
| AATS | Air Ambulance Transfer System |
| AAU | Acute Assessment Unit |
| AAWC | Armenian American Wellness Center |
| AAWC | Automobile Accident With Casualties |
| ABA | Arrived By Ambulance |
| ABBI | Acute Breast Biopsy Instrumentation |
| ABC | Active Breathing Coordinator |
| ABEP | Accreditation Body Evaluation Program |
| ABH | Adventist Bolingbrook Hospital |
| ABH | Aimbuilder Hospital |
| ABHM | American Board of Hospital Medicine |
| ABHR | Alcohol-Based Hand Rub |
| ABI | Arterial Blood Index |
| ABIP | Acquired Brain Injury Program |
| ABMC | Alexian Brothers Medical Center |
| ABMS | American Board of Medical Specialties |
| ABN | Advanced Beneficiary Notice |
| ABPM | Ambulatory Blood Pressure Monitoring |
| ABPN | American Board of Professional Neuropsychology |
| ABS | Absorb |