| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Lehman, Erica | Children's Hospital of Philadelphia | Psychologist | PHILADELPHIA | United States | Pennsylvania | View |
| Lehnart, Judith | Catholic University of Applied Sciences Mainz | Professor | Mainz | Germany | Rheinland-Pfalz | View |
| Leigh, Beverly | VA | Licensed Professional Mental Health Counselor | Mountain Home | United States | Tennessee | View |
| Leijten, Irma | LIJV, NOBCO | Coach, trainer | 's-Hertogenbosch | Netherlands | Noord-Brabant | View |
| Leijzer, Lianne | GGZ Goedebuur | GZ psycholoog | Amsterdam | Netherlands | Noord-Holland | View |
| Leite, Stella | Ateliê da Mente | Psicóloga | Belo Horizonte | Brazil | Minas Gerais | View |
| Leiva, Jhoserin | | Psicóloga | Lima | Peru | | View |
| LeJeune, Jenna | Portland Psychotherapy Clinic, Research, & Training Center | Licensed Psychologist | Portland | United States | Oregon | View |
| Lemay, Francis | Psychologie Déploiement | Psychologist | Quebec City | Canada | Quebec | View |
| Lemieux, Justin | Swedish | LICSW | Edmonds | United States | Washington | View |
| Lemmi, Blanca | Membresía por un año | Lic en Psicología | Mar del Plata | Argentina | Buenos Aires | View |
| LEMON, JAMES RICHARD | National Health Service (NHS) | Consultant Clinical Psychologist | Moffat | United Kingdom | Dumfries and Galloway | View |
| Lennox Thompson, Bronwyn | University of Otago, Christchurch | Programme Director, Postgrad Pain Mgmt | Christchurch | New Zealand | Canterbury | View |
| Lentzas, Georgios | Private practice - Thessaloniki | Psychiatrist | Thessaloniki | Greece | Thessaloniki | View |
| Leonard-Curtin, Aisling | ACT Now Purposeful Living | Counselling Psychologist | Wexford | Ireland | | View |
| Leonova, Anna | Private Practice | Psychologist | Bratislava | Slovakia | | View |
| Leppez, Nathaly | Neurorienta | psychologist | RM - Metropolitana | Chile | | View |
| Leprich-Graves, Dawn | Celeste Genevieve Counseling | Clinical Therapist/ Practice Owner | Aurora | United States | Illinois | View |
| Lerner, Nina | Private Practice | Social Worker | South Orange | United States | New Jersey | View |
| Lese-Fowler, Karen | Mindful Growth Psychology, APC | Psychologist | San Diego | United States | California | View |
| Leshner, Anna | none | Clinical Psychologist | Glendale | United States | California | View |
| lestino, john | NJASP;NASP;EPTSD | School Psychologist | Moorestown | United States | New Jersey | View |
| Letelier, Eduardo | Private Clinic. | Médico Psiquiatra | Santiago | Chile | Santiago Metropolitan | View |
| Lev, Avigail | Bay Area CBT Center | clinical psychologist | San Francisco | United States | California | View |
| Levering, LeAnn | Viesca Therapeutic Services | Psychotherapist | Austin | United States | Texas | View |
| Levin, Anna | New England Health Psychology Partners, LLC | Clinical Health Psychologist | Boston | United States | Massachusetts | View |
| Levin, Michael | Utah State University | Professor | Logan | United States | Utah | View |
| Levine-Miles, Sarah | Sarah Levine-Miles, LLC | Mental Health Therapist, Licensed Clinical Social Worker | Rockville | United States | Maryland | View |
| Levine, Sarah | Braintree Public Schools | BCBA | Boston | United States | Massachusetts | View |
| Levinsen, Nadia | Private Practice | Counsellor | Malmö | Sweden | Skåne län | View |
| Levinson, Sarah | Creative Relating Psychology Psychotherapy and NYC Cognitive Behavioral | Therapist | New York | United States | New York | View |
| Levitsky, Neil | University of Toronto | Psychiatrist | Toronto | Canada | Ontario | View |
| Lewin, Rivian | McLean Hospital/ Harvard Medical School | Licensed Psychologist | Brookline | United States | Massachusetts | View |
| Lewis, Cara | University of Chicago | Emerging Social Worker | Chicago | United States | Illinois | View |
| Lewis, Elizabeth | McLean Hospital/Harvard Medical School | Staff Psychologist | Belmont | United States | Massachusetts | View |
| Lewis, John | The Centered Life Therapy | Counselor | Naperville | United States | Illinois | View |
| Lewis, Richard | SwiftRiver Behavioral Health Consultation LLC | Consultant/Clinical Assistant Professor | Yarmouth | United States | Maine | View |
| Li, MaoWen | Shanghai Orientrue-Talkingpool | Consultant & R&D Director | Shanghai | China | Shanghai | View |
| Li, Yan | Duke University | Licensed Psychologist | Durham | United States | North Carolina | View |
| Liao, Betty | University of California, San Francisco | Psychologist | Fresno | United States | California | View |
| Libera, Beate | self-employed in Berlin | Psychotherapist in out-patient service | Berlin | Germany | Berlin | View |
| Libman, Stuart | PLEA School | Child Psychiatrist/Medical Director | Pittsburgh | United States | Pennsylvania | View |
| Lichtenberger, Aldana | Centro Argentino de Terapias Contextuales | Therapist | Buenos Aires | Argentina | Capital federal | View |
| Lieb, Robert | Pacific Psycare Associates | Clinical Psychologist | San Mateo | United States | California | View |
| Lieberman-Lapan, Rhonda | LCSW-C | Psychotherapist | Silver Spring | United States | Maryland | View |
| Liebman, Dale | Private Practice | Psychotherapist | Owings Mills | United States | Maryland | View |
| Liedtke, Florian | Dipl. Psych. Florian Liedtke | Praxis | Muenchen | Germany | Bayern | View |
| Lieffering, Heleen | Instituut voor Vraaggerichte Psychotherapie | Psychologist and Psychotherapist | Katwijk | Netherlands | Zuid-Holland | View |
| Lieffering, Janet | NIP, Psyned | Psycholoog | Oegstgeest | Netherlands | Zuid-Holland | View |
| Liggett, Kait | self-employed | Behavior Analyst | Erie | United States | Colorado | View |