- AccentCare
- Accolade
- Accolade Healthcare
- Accordius Health
- Accountable Care Organizations
- Accura
- Accura HealthCare
- Accushield
- ACHA
- ACHCA
- Activated Insights
- ACTS Retirement Services
- Acts Retirement-Life Communities
- Acumen
- ADME Investment Partners
- Administration for Community Living
- Advance Care Planning
- Advancing Excellence in Long-Term Care Collaborative
- Advantage Living Centers
- AdventHealth