- Medcom Systems Inc.
- Medex Northwest
- Media Financial Management Association
- Medical Alliance Partnership
- Medical Association of the State of Alabama
- Medical Business Resources
- Medical Care Access Coalition
- Medical Center - Navicent Health
- Medical Center Barbour
- Medical Center Enterprise
- Medical Center of Central Georgia
- Medical Center of South Arkansas
- Medical Center of Trinity
- Medical City Arlington
- Medical City Fort Worth
- Medical College of Georgia
- Medical College of Georgia, MCG Health System
- Medical deScriptions
- Medical Eye Bank of West Virginia
- Medical Group Management Association
- Medical Mutual
- Medical Professional Liability Association
- Medical Records Reference Service LP
- Medical Society of Sedgwick County
- Medical Society of the State of New York
- Medical Specialists
- Medical Transcription Industry Alliance
- Medical University of South Carolina
- Medical West
- Medicine On Time
- Medifacts International
- Medifacts International
- Medilodge of Howell
- Medina County Board
- Medina Memorial Hospital
- Mediprime Group Ltd.
- MeDRA MSSO
- Medrad, Inc.
- Medsource
- MedStar Georgetown University Hospital
- MedStar Montgomery Medical Center
- MedStar Southern Maryland Hospital Center
- MedStar Washington Hospital Center
- MedTrials, Inc.
- Medtronic
- Medtronic
- Meeting and Conference Solutions Inc
- Meeting Expectations
- Meeting Management Services, Inc.
- Meeting Matrix International, Inc.