| Michael Lester | Chief Executive Officer | LifeStance Health |
| Geoffrey Lieberthal | Principal | Lee Equity Partners LLC |
| J. David Likens | CEO | ABC Recovery Center |
| Glenn Lippman, MD, DFAPA | Consulting Physician | Vertess |
| Patrick Mahoney | Other | Morningside Recovery |
| Anthony Marquez | Vice President of Business Development | Raleigh House of Hope |
| Brant Massman | (not set) | Center for Behavioral Health |
| Louise McCallion | Executive Director | Living at Reflections, LLC |
| William McCormick | CEO | Medivance Billing Service |
| Mark McGoldrick | Other | Constellations Recovery |
| Steve McGrew | CEO | Cornerstone of Recovery |
| Jim McGuire | Vice President | iRecover Treatment Centers |
| Cesar McGuire | Executive | Executive Recovery Group |
| Gilbert McGuire | CEO | Executive Recovery Group |
| Kara McVey CPC, CPMA | Owner | Ilex Consulting, LLC |
| Cory Mertz M&AMI | Managing Partner | Mertz Taggart |
| Ben Meyer | CFO | Transcend |
| Gabe Meyers | Director of Business Development | Community Recovery |
| Evan Miller | CEO | AKUA Mind & Body |
| Ann Miller, PhD | (not set) | (not set) |
