- Mohave Sunrise Rotary Club
- Molina
- Molina Healthcare
- Moments Hospice
- Monarch Healthcare
- Monmouth Medical Center
- Monogram Health
- Montgomery Hospice
- Montgomery Hospice & Prince George’s Hospice
- Montgomery Hospice & Prince George’s Hospice
- Morehouse School of Medicine
- Morgan Lewis
- Morgan Stanley
- Morning Consult
- MorseLife Health System
- MorseLife Hospice and Palliative Care
- Mosaic Life Care Health Systems
- Motivate Lab
- Mount Sinai
- Mount Sinai at Home