Contact us
Write, call, or book directly. Every new client starts with a clinical interview.
Most questions about assessment, pricing, and the process are answered in our FAQ. Want to book an assessment? The fastest way is to book your clinical interview directly.
If you can't find what you're looking for, or you'd rather talk to us first, you're of course welcome to write below or ask our AI assistant.
Markus Lien
Clinic Director
I am an authorized clinical psychologist and a member of Dansk Psykolog Forening. I founded Alethia and lead the clinic, where we assess and treat adults for ADHD/ADD, autism, PTSD, anxiety, depression and personality disorders. I have run a private practice since 2021 alongside positions in the public and private sectors. Alethia is built on what I have seen work, and not work, both inside and outside the public system.
Approach
Psychodynamic and client-centered, emphasizing clarity and measurable short- and long-term progress. Courses and supervision in CBT; trained and supervised in CPT for PTSD; MAPS-certified in MDMA-assisted psychotherapy; supervised in Schema and Narrative Therapy; ADOS-2 certified; experienced in WAIS/WISC assessments and psychoeducation.
Experience
Includes work at:
- Norway's leading addiction rehabilitation clinic
- Ward psychologist at a dual-diagnosis psychiatric hospital
- Denmark's largest private psychiatric hospital
- A Copenhagen clinic for expatriates
Alethia, grounded in the philosophical ideal of truth as what comes into the light, is dedicated to precise assessments that uncover underlying causes and lead to tailored, effective treatment for each individual client.
Ask our AI assistant
Questions about assessment, pricing, or booking?
Type or talk. The microphone is only used if you want to talk.
No health data is processed.
The AI assistant may give inaccurate answers.
Always confirm important information with us directly.
Our address
Visit us at our clinic in central Copenhagen
Address
Fiolstræde 14, 1. sal
1171 København
Public transport
Nørreport Station, approx. 5 min walk
Entrance
Ring 'Alethia' at the street door. First door on the left, ring again at the clinic door. Take a seat in the waiting room to the right.
How to get started
Write or call
Send us a message via the form above or call us at +45 42 62 00 51 during phone hours (Mon & Thu 10:00–12:00). We typically respond within 2 business days.
Book your first visit
All new clients start with a clinical interview (approx. 2 hours). You can book directly online via our booking page, or we can help you find a suitable time.
Find us
The clinic is in Copenhagen's Latin Quarter, near Nørreport Station. We offer assessment and therapy in Danish, English, Norwegian, and Swedish.