About ADHD Clinic
ADHD Klinik Copenhagen is part of Alethia, a clinic with psychiatrist and psychologist under one roof.
Our mission
Fast and thorough ADHD assessment
The public sector wait time for ADHD assessment is typically a year and a half or more (Danish Health Authority, 2025). This means many adults live with untreated ADHD for years, affecting their work, relationships, and quality of life.
We offer assessment with short wait times, where you are thoroughly evaluated by authorized clinical psychologists and psychiatrists. No referral needed.
Up to 80% of adults with ADHD have at least one other mental health disorder (Katzman et al., 2017). That is why we always start with a comprehensive screening, so we can provide the right treatment, not just for ADHD, but for the full picture.
Our approach
Evidence-based assessment
We use DIVA-5 as the primary diagnostic interview for ADHD assessment. It is a semi-structured interview of the type recommended in the Danish clinical guideline for adult ADHD assessment (DMPG, 2025). DIVA-5 covers all DSM-5 criteria for ADHD, both in childhood and adulthood.
Our comprehensive clinical screening covers anxiety, depression, trauma, personality disorders, and other diagnoses that can resemble or overlap with ADHD.
Psychologists conduct interviews and assessment and reach the diagnostic conclusion. Psychiatrists review the full picture and manage medical treatment. The collaboration between disciplines ensures no part of your care is overlooked.
The team
Our clinicians
Markus Lien
Clinic Director
Authorized clinical psychologist
Markus founded Alethia and leads the clinic. He has experience from both public and private psychiatry and has overall responsibility for the clinic's assessment processes and quality. He conducts psychological assessments using recognized diagnostic tools, provides psychotherapy and psychoeducation, and works closely with the clinic's psychiatrists to ensure a coherent treatment plan for each client. He is currently training to become a specialist in psychotherapy with adults.
Mathias Glorvigen
Authorized clinical psychologist
A central part of Mathias's work is ADHD and autism assessments, which he approaches with an emphasis on a thorough and reassuring process. In connection with this, he also offers psychoeducation about ADHD. He has experience from private psychiatry, including the treatment of substance abuse. In therapy, Mathias works primarily from cognitive behavioural therapy, supplemented with newer cognitive methods and a solution-focused approach.
Dalida Besirevic
Authorized clinical psychologist
Dalida works with assessment, psychoeducation and therapy, including for ADHD, autism, anxiety, depression, stress, trauma and grief. She has experience from private psychiatry, assessing and treating adults. In therapy, she works from cognitive behavioural therapy (CBT), metacognitive therapy and acceptance and commitment therapy (ACT). She puts weight on a safe space where people are met with curiosity, openness and respect, and on understanding both the person and what lies behind the difficulties they experience.
Rasmus Wæhrens
Psychiatrist
Specialist in Psychiatry, PhD
Rasmus holds a PhD in functional disorders and has many years of experience from the public healthcare system and private psychiatry. Rasmus works closely with each client to find the right medical treatment. He emphasizes thorough evaluation and ongoing dialogue, so medication is tailored to each individual's needs and daily life. Rasmus is also the clinic's medically responsible physician (virksomhedsansvarlig læge), registered with the Danish Patient Safety Authority.
Rafl Adnan
Medical doctor
Senior Psychiatry Resident, PhD
Rafl holds a PhD in brain and nervous system disorders and has experience from both public and private psychiatric care. She focuses on tailoring treatment to the individual client, with attention to everyday life and lifestyle.
Markus Hjorth
Medical doctor
Senior Psychiatry Resident
Markus is a PhD fellow at the University of Copenhagen and the Mental Health Centre Copenhagen. He qualified as a physician in 2018 and has worked in hospital psychiatry since 2021, assessing and treating conditions including depression, anxiety, ADHD, substance use disorders and personality disorders. His research at the centre's outpatient clinic for affective disorders focuses on treatment resistant depression and the biological changes of the brain in mental illness.
Clotilde Rose Honoré
Clinic assistant
Psychology student, UCPH
Clotilde is about to complete her master's degree. Through her bachelor's and master's studies she has worked broadly across clinical psychology, developmental psychology and neuropsychology, among other areas. Her bachelor's project was on childhood neglect, and her master's thesis explores the experience of returning to everyday life after an illness. At Alethia she works as a clinic assistant and helps with booking and practical questions.
Part of Alethia
ADHD Klinik is part of Alethia ApS, which also offers assessment for autism, personality disorders, anxiety, depression, and PTSD/C-PTSD, as well as psychotherapy and medical treatment.
Visit alethia.dk →