- AngMar Medical Holdings
- Anthem
- Apex Hospice and Palliative Care
- Ariadne Labs
- Arizona End-of-Life Care Partnership
- Arizona Hospital and Health Association
- Arizona Select Hospice
- Arkansas Hospice
- Armis
- Asana Hospice
- Ascend Health
- Ascend Hospice
- Ascension Health
- AseraCare
- Aspire Health
- AT&T
- AtlantiCare Home Health
- Audax Private Equity
- Avalere Health
- Avanti Health Care
