Get in Touch
Reach out to us for more information or to schedule an assessment. We are here to support you on your journey towards a more balanced and meaningful life.
Markus Lien
Clinic Director
I’m a psychologist authorized by the Danish Supervisory Board and a member of Dansk Psykologforening. Since 2021 I’ve run a private practice in Copenhagen; I’m now introducing Alethia, a clinic where our psychologists and psychiatrists assess and treat adults for ADHD/ADD, autism, PTSD, anxiety, depression, OCD, personality disorders and addiction—always with a clear plan grounded in accurate diagnosis.
Approach
Psychodynamic and client-centered, emphasizing clarity and measurable short- and long-term progress. Trained in CBT, CPT for PTSD, plus MDMA-assisted psychotherapy; supervised in Schema and Narrative Therapy; ADOS-2 certified; experienced in WAIS/WISC assessments and psychoeducation.
Experience
Includes work at:
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Norway’s leading addiction rehabilitation clinic
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Ward psychologist at a dual-diagnosis psychiatric hospital
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Denmark’s largest private psychiatric hospital
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A Copenhagen clinic for expatriates
Alethia, grounded in the idea of truth and disclosure, is dedicated to precise assessments that clarify underlying causes and lead to tailored, effective treatment for each individual client
Our Location
Visit us at our clinic in the center of Copenhagen
Address
Psykologhuset Trekanten
Nørre Voldgade 21, 3rd floor
1358 Copenhagen