| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Laird, Kelsey | Inner Strength Psychotherapy | Clinical Psychologist | Berkeley | United States | California | View |
| Lak, Elnaz | Shahid madani university | Psychologist | Tabriz | Iran, Islamic Republic of | | View |
| Lam, Chun Kei Edward | University of Denver | Clinical Psychologist | Hong Kong | Hong Kong | | View |
| Lam, Michelle | Hospital Authority Hong Kong | Clinical Psychologist | Tseung Kwan O, New Territories | Hong Kong | Sai Kung | View |
| Lam, Sarah | Bankstown Lidcombe Hospital | Clinical Psychologist | Bankstown | Australia | New South Wales | View |
| Lambie, Ian | university of auckland | clinical psychologist | Mount Eden | New Zealand | | View |
| Lamenza, Miguel | particular | Psicólogo | Mar del Plata | Argentina | Buenos Aires | View |
| Lamers, Saskia | L-psychology | GZ-psycholoog | Vijfhuizen | Netherlands | Noord-Holland | View |
| Lami, Maria | IPSICCO | PhD | Santiago del Estero | Argentina | Santiago del Estero | View |
| Lamp, Amber | Ray of Light Counseling Services, LLC | Licensed Professional Counselor | Columbus | United States | Georgia | View |
| Lance, Mary | Mary Katherine Therapy | Marriage and Family Therapist | Greenville | United States | South Carolina | View |
| Landart, Débora | Profesional | LICENCIADO EN PSICOLOGIA | Villa María | Argentina | Cordoba | View |
| Landau, Danielle | Clinical Psychology Department | Clinical Psychologist | London | United Kingdom | London | View |
| Lander Miller, Erica | Behavioral Care Center of New Jersey | Founder and Clinical Director | Florham Park | United States | New Jersey | View |
| Landgreen, Lotte | Psykologerne Landgreen I/S | Neuropsykolog and ACT-terapist | aabenraa | Denmark | | View |
| Landowski, Pierre | Private Cabinet | Psychologist | LYON | France | Rhône | View |
| Landrum, Katie | Positive Behavior Support Corp | LMHC/BCBA/Senior Analyst | Winter Garden | United States | Florida | View |
| Langer, Álvaro | San Sebastián University | Associate Professor | Valdivia | Chile | | View |
| Langley, Stuart | Stuart Edward Michael Langley Psychology | Psychologist | FARMBOROUGH HEIGHTS | Australia | New South Wales | View |
| Lankford, Christopher | Psychology and Counseling Associates | Mental Health Therapist | Fayetteville | United States | Arkansas | View |
| Lanza di Scalea, Teresa | Women's Psychiatry and Well-Being | Founder | Austin | United States | Texas | View |
| Lanzl, Claudia | Praxis für Psychotherapie | Dipl.-Psych. | Bernau bei Berlin | Germany | Brandenburg | View |
| Lappalainen, Raimo | Department of Psychology, University of Jyväskylä | Professor Emeritus | Tampere | Finland | Tampere Region | View |
| Lappin, Maeve | Ulster University & Queens University Belfast | Speech and Language Therapist and Behavior Analyst | Belfast | United Kingdom | Co Antrim | View |
| LaPray, Shawn | Renewed Foundations LLC | Counselor | Ammon | United States | Idaho | View |
| Lara, Gerardo | particular | Licenciado | Saltillo | Mexico | Coahuila | View |
| Larsson, Andreas | Mid Sweden University | Senior Lecturer / Lic. Psychologist | ÖSTERSUND | Sweden | Jämtlands län | View |
| Lashley, Samuel | Private Practice | Clinical Psychologist | Arlington | United States | Virginia | View |
| Lask, Mauricio | Private Practice/ La Clinica de la Raza | Psychologist | Berkeley | United States | California | View |
| Lasprugato, Lou | Private consulting practice | Psychotherapist, Peer-Reviewed ACT Trainer | Blacksburg | United States | Virginia | View |
| Lassila, Helmi | Psykologipalvelut Helmi Lassila | Psychotherapist | Helsinki | Finland | Uusimaa | View |
| Lau, Yuet Han | Private Psychology Practice | Clinical Psychologist | Kowloon | Hong Kong | | View |
| Laurin, Kira Lynn | CRPO | Registered Psychotherapist | Hawkesbury | Canada | Ontario | View |
| Laursen, Jens | Private Practitioner | Psychologist | Aarhus V | Denmark | Århus | View |
| Lauwen, Ineke | Private practice as a supervisor | clinical psychologist/psychotherapist | Amsterdam | Netherlands | Noord-Holland | View |
| Lauwers, Katelijne | Into the BLUE - Psychologie & Yoga | Psychologist (PhD) - Behavioral counselor - Yoga teacher | Oostende | Belgium | West-Vlaanderen | View |
| Lauwers, Tine | Clinical | Psychologist | Herenthout | Belgium | Antwerpen | View |
| Laux, Walter | ACT Counseling | Counselor | Milwaukee | United States | Wisconsin | View |
| Laverack, Ben | Clinic of Psychology | Psychologist | Hamilton | Australia | New South Wales | View |
| LaVieri, Gretel | Self-employed private practice | Clinical social worker | Pennington | United States | New Jersey | View |
| Lawliss, Katherine | Dr. Katie Lawliss | Clinical Psychologist | Keeseville | United States | New York | View |
| Lawrence, Emily | Veterans Health Administration | Clinical psychologist | Fresno | United States | California | View |
| Lawson, Lauren | La Trobe University | Senior Lecturer | Reservoir | Australia | Victoria | View |
| Lawson, Tess | New Leaf Behavior Center | BCBA, Life Coach, Program Supervisor, Clinic Owner | Aberdeen | United States | Washington | View |
| Lazarovich, Regina | Compass CBT Psychology, PC | Clinical Psychologist and Owner | Scotts Valley | United States | California | View |
| Le-Chau, Michelle | Dr. Michelle Le-Chau | Psychologist | Los Angeles | United States | California | View |
| Leach, Jennifer | Self -employed | Clinical Psychologist | New York | United States | New York | View |
| Leader, John Francis | Psychological Society of Ireland | Clinical Psychologist | Dublin | Ireland | Dublin | View |
| Leaderman, Jared | Jared Leaderman, Ph.D. | Counselor | Mountain View | United States | California | View |
| Leal, Diego | Universidad del Rosario | psychologist | Bogota | Colombia | Distrito Capital de Bogotá | View |