- Accreditation Commission for Health Care
- Accredited Home Health Services
- Accredited Medical Equipment Providers of America
- Accurate Home Care
- Ace Hardware
- ACHC
- Acro Pharmaceutical Services
- ACT The App Association
- Actinium Healthcare Holdings
- Active Day
- Activity Daily Living
- Acumen Research and Consulting
- Ad Council
- Adapt
- AdaptHealth
- AdaptHealth LLC
- Addison Care
- Addus
- Addus HomeCare
- Addus HomeCare Corp.
