| Name | Affiliation | Occupation / Position Title | City | Country | State | |
|---|
| Massey, Morgan | LifeStance | Mental Health Therapist | Edmond | United States | | View |
| Masterpasqua, Frank | Inst for Graduate Clinical Psychology, Widener University | Professor Emeritus | Swarthmore | United States | Pennsylvania | View |
| Mat Zin, Nora Binti | International Islamic University Malaysia | consultant psychiatrist | Kuantan | Malaysia | Pahang | View |
| Matacz- Szymanowicz, Iwona | NZOZ Diada NFZ Pyskowice, ODT Pozytywka | psychoterapeuta | Zabrze | Poland | śląskie | View |
| Matan, Adee | Private practice | Psychotherapist | Tel Aviv | Israel | | View |
| Matejcich, Nicole | Private | Psychologist | Capital Federal | Argentina | Buenos Aires | View |
| Matern, Lauren | Lauren Matern Psychotherapy | LMFT #164054 | Sunnyvale | United States | California | View |
| Mather, Doug | The Creation Company (2020) Ltd | Specialist in Human Behaviour | London | United Kingdom | London | View |
| Mathews, Marielle | Delaware County Center for Psychological Services LLC | Psychologist | Havertown | United States | Pennsylvania | View |
| Mathis, Kimberly | VA San Diego Healthcare System | Staff Psychologist | Chula Vista | United States | California | View |
| Matsen Devitt, Julie | Hopewell Psychology | Licensed Psychologist | King of Prussia | United States | Pennsylvania | View |
| Mattes, Josef | private practice & Universität Wien | Researcher, Psychotherapist, MBSR teacher, Feldenkrais teacher | Wien | Austria | | View |
| Matthijssen, Denise | Pivate practice | familytherapist and coach | Zoelmond | Netherlands | Gelderland | View |
| Mattoli, Scarlett | Psynamo Limited | Director/Clinical Psychologist | Central | Hong Kong | Central and Western | View |
| Mattos, Alexandre | Private office | Psychotherapist | Águas da Prata | Brazil | Sao Paulo | View |
| Maus-Chaudhury, Nicole | Finding Hope LLC | Therapist/Practice Owner | Ellicott City | United States | Maryland | View |
| Maviglia, Adrienne | ABAI | Clinical Executive Director | Goshen | United States | New York | View |
| Maxey, C. David | Portland Psychological Services | Licensed Independent Psychologist Associate | Portland | United States | Oregon | View |
| Maxwell, Maggie | Ora et Labora Catholic Counseling | LPC, LCPC | Front Royal | United States | Virginia | View |
| May, Robin | Australian Psychological Society, Australian Association of Smoking Cessation Specialists, Australian Association of Cognitive & | Psychologist | Royal North Shore Hospital | Australia | New South Wales | View |
| Mayaudon González, Enrique | Universidad Anáhuac | Psicólogo Clínico | Estado de México | Mexico | | View |
| Maynard, Patricia | Tapestry Wellness Counseling Practice | Therapist/Owner | MEMPHIS | United States | United States Minor Outlying Islands | View |
| Mazhyrina, Nataliia | Private Practice | Psychologist | Kyiv | Ukraine | | View |
| Mazurczak, Agnieszka | pomocnia | Ma in psychology | poznan | Poland | wielkopolskie | View |
| Mazza, Marisa | choicetherapy | Psychologist | Berkeley | United States | California | View |
| Mazzei, Rae | Evolutions Behavioral Health Services | Health Psychologist | Chandler | United States | Arizona | View |
| Mazzeo, Gabriela | Equipo Fons | Psicoterapeuta | Bahía Blanca | Argentina | Buenos Aires | View |
| Mc Carroll, Paul | Northern Health Social Care Trust | ACT Coach/Therapist/ Peer Recovery Trainer | Belfast | United Kingdom | Co Antrim | View |
| McAnulty, David | Abilene Christian University | Professor of Psychology | Abilene | United States | Texas | View |
| McBride, Andrew | Arizona OCD and Anxiety Center, LLC | Licensed Professional Counselor | Safford | United States | Arizona | View |
| McCabe, D'Arcy | Private Practice | MSW, RSW, Social Worker, Psychotherapist | Toronto | Canada | Ontario | View |
| McCabe, Katie | Self-employed private practice | Therapist | Westport | United States | Connecticut | View |
| McCandless, James | BABCP | Cognitive Behavioural Psychotherapist | London | United Kingdom | London | View |
| McCauley, Ellis | Private Psychology Practice | LMFT Psychotherapist Lic #52057 | San Rafael | United States | California | View |
| McCaw, Norell | McCaw Psychological Services, PLLC | Psychotherapist | Olympia | United States | Washington | View |
| McChesney, Kathleen | Vail Behavioral Health/University of Colorado Anschutz Medical Campus | Licensed Clinical Psychologist | Edwards | United States | Colorado | View |
| McCleary, Karen | NXCPS | Psychotherapist | CRUMLIN | United Kingdom | Co Antrim | View |
| McComish, Nanette | APS & APS College of Organisational Psychologists | Executive Coach Organisational Psychologist | Adelaide | Australia | South Australia | View |
| McConnell, Chris | APCP | Psychotherapist / Counsellor | Dublin | Ireland | | View |
| McCorquodale, Lisa | Fanshawe College | Professor | LONDON | Canada | Ontario | View |
| McCoul, Robert | Atlantic Behavioral Medicine, Inc | Licensed Psychotherapist | CONCORD | United States | New Hampshire | View |
| McCracken, Lance | Uppsala University | Professor of Clinical Psychology | Uppsala | Sweden | Uppsala län | View |
| McCranor, George | ACT/ Existential | Counsellor | Rugby | United Kingdom | Warwickshire | View |
| McCrory, Marie | St Malachy's College, Belfast | Learning Mentor / BCBA | BELFAST | United Kingdom | | View |
| McCurry, Chris | Self Employed Psychologist | Clinical Child Psychologist | Seattle | United States | Washington | View |
| McCurry, Susan | University of Washington/ABCD PLLC | Research Professor Emeritus/Psychologist | Seattle | United States | Washington | View |
| McCutcheon, Kevan | Private Psychology Practice | Clinical Psychologist | Peninsula | United States | Ohio | View |
| McDonald, Brendan | Outpatient Counseling | Clinician | Richmond | United States | Virginia | View |
| McDonald, Stacey | Good Thanks Therapy | Psychotherapist | Guelph | Canada | Ontario | View |
| McDowell, Heather | auckland district health board | Consultant Clinical Psychologist | Auckland | New Zealand | | View |
