| Name | Affiliation | Occupation / Position Title | City | Country | State | |
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| Kivlovitz, Josh | Wise Mind Behavioral Therapy, PLLC | Therapist | Salt Lake City | United States | Utah | View |
| kırbaş, merve funda kırbaş cankurtaran | Istanbul Kent Uni | Psychologist | İstanbul | Turkey | Istanbul | View |
| Kjelgaard, Rikke | www.rikkekjelgaard.com | Psychologist, author, peer reviewed ACT trainer, chief rock'n'roller | Svedala | Sweden | | View |
| Klaus, Rafaela | Clínica privada | Psicóloga Clínica | Porto Alegre | Brazil | Rio Grande do Sul | View |
| Klein, Michael | Gracie Square Hospital | Licensed Clinical Psychologist | New York | United States | New York | View |
| Klein, Philipp | Lubeck University Medical School | Psychiatrist / Psychotherapist | Luebeck | Germany | | View |
| Klein, Wanda | Psypraktijk Amsterdam | Psychologist | Amsterdam | Netherlands | Noord-Holland | View |
| Kleinhendler, Ariel | private clinic | Psychologist | Tel Aviv-Yafo | Israel | | View |
| Kleinhesselink, Marianne | nvo nfg rbcz | MSc | Aalten | Netherlands | Gelderland | View |
| Kleinschmidt, Erich | Well Behavioral Health | Mental Health Provider | Westford | United States | Massachusetts | View |
| Klemen, Jane | none | Clinical Psychologist | Magdeburg | Germany | | View |
| Kleszcz, Bartosz | Uczę się ACT | Psychotherapist | Sosnowiec | Poland | śląskie | View |
| Klimenko, Taras | SKY.ry | erikoislääkäri, psykoterapeutti | Kerava | Finland | | View |
| Klinkhamer, Fawzia | StressWise Academy | therapist, coach | Naarden | Netherlands | | View |
| Kloep, Megan | K&L Psychological Services PLLC | Clinical Psychologist | Nashville | United States | Tennessee | View |
| Klomp, Femke | Femke Klomp | Coach & trainer | Bemmel | Netherlands | Gelderland | View |
| Klooster, Marian | Amersfoort | psycholoog nurse | Amersfoort | Netherlands | Utrecht | View |
| Klostermann, Guadalupe | clinica | Psicóloga | Montevideo | Uruguay | | View |
| Klugman, Sam | Private Practice | Licensed Clinical Psychologist | New York | United States | New York | View |
| Knausenberger, Monika | APS | Psychologist | Margaret River | Australia | Western Australia | View |
| Knoblach, Daniel | VA Maryland Health Care System | Clinical Psychologist | University Park | United States | Maryland | View |
| Knoess, Mishell | Inspired Life Counseling | Associate clinical social worker | Redding | United States | California | View |
| Knoll-Miller, Timshel | Gunditjmara Aboriginal Cooperative | Psychologist | Warrnambool | Australia | Victoria | View |
| Knopp, Kayla | Enamory | Clinical Psychologist | San Diego | United States | California | View |
| Koch, Birgit | Selbständig | Psychologin M.Sc. | Tostedt | Germany | Niedersachsen | View |
| Koch, Lauren | Lauren Koch, PhD, PLLC | Licensed Psychologist | Spokane | United States | Washington | View |
| Kochhar, Kathryn | BABCP | Psychotherapist, CBT/ACT | Cheshire | United Kingdom | Greater Manchester | View |
| Kocum, Michal | Heritage Professional Associates | Counselor | Wheaton | United States | Illinois | View |
| Koelemay, Stephen | Private Practice | Psychologist | Boulder | United States | Colorado | View |
| Koenderink, Alyssa | Natural Self Psychotherapy Services | Registered Psychotherapist | North Bay | Canada | Ontario | View |
| Koenig, Rachel | Behavioral innovations | Behavior analyst/consultant | Jacksonville Beach | United States | Florida | View |
| Koh, Eugene | University Putra Malaysia | Psychiatrist/ Medical Lecturer | Serdang | Malaysia | Selangor | View |
| kohlenberg, barbara | University of Nevada School of Medicine | Clinical Psychologist | reno | United States | Nevada | View |
| kolahdouzan, seyed ali | Isfahan University of Medical Sciiences | University Faculty | Esfahan | Iran, Islamic Republic of | Esfahan | View |
| Kole-Snijders, A.M.J. | Adelante | psychologist | | Netherlands | Limburg | View |
| Konczey, Saryna | Balancing ACT Family Therapy Center PC | LMFT, LPCC | Campbell | United States | California | View |
| Koo, Kelly | Self-employed; UCSF Department of Psychiatry | Clinical Psychologist | Oakland | United States | California | View |
| Koons, Regina | District 118 | BCBA | Rolling Meadows | United States | Illinois | View |
| Korczyk, Donna | APA | Psychologist | Cranberry Twp. | United States | Pennsylvania | View |
| Kordonski, William | Family Counseling Center | Therapist | BALTIMORE | United States | Maryland | View |
| Korkut, Töre Simge | Moti Institute | Clinical Psychologist | İstanbul | Turkey | Istanbul | View |
| Kornacki, Tamara | N.A. | Psychologist | Yes | Canada | Ontario | View |
| Koroleva-Regalado, Alexandra | BY YOUR SIDE | BCBA | Schaumburg | United States | Illinois | View |
| Korsen, Meredith | New York University | Psychotherapist | Brooklyn | United States | New York | View |
| Korsten, Paul | InVivo Amstelveen | Psychotherapist | Amstelveen | Netherlands | Zuid-Holland | View |
| Kossakowska, Barbara Anna | Private Practice | Online therapy | Warsaw | Poland | mazowieckie | View |
| Kossmann, Marc | Included Health | Associate Clinical Director of Behavioral Health | Havertown | United States | Pennsylvania | View |
| Kostiuk Warren, Julia | NZCCP | Clinical Psychologist | Auckland | New Zealand | Auckland | View |
| Kostiuk, Oksana | Private Psychology Practice | Psychologist | Odesa | Ukraine | Odes 'ka Oblast' | View |
| Kotelnikova, Anastasia | Institute of Integrative Family Therapy (Moscow, Russia) | Counselor | Herceg Novi | Montenegro | | View |