My practice
Welcome to Margriet Harmsen psychology!
My name is Margriet, and I work as a Healthcare psychologist for children and adolescents up to 18 years old, and their parents. I offer treatment and guidance when children are struggling and/or when parents or the school have concerns about your child. I focus on the child, but I always involve the family and you as parents. My goal is to connect with you as effectively and quickly as possible, to help you get back on track.
In addition to working with children and families, I also offer treatment for adults in the form of trauma treatment (EMDR and directive writing therapy).
I offer treatment sessions in Dutch and English. Evening sessions are also available for trauma treatment for adults.
Who am I
My name is Margriet Harmsen. I have worked as a child and adolescent psychologist for over 13 years. I have extensive experience in both primary and specialized mental healthcare. I have worked as a Healthcare psychologist (GZ-psychologist) for almost four years and as an IMH (jnfant mental health) specialist for two years. This experience has familiarized me with working with a wide range of complaints and problems, and I can support you and/or your family with almost any question you may have. In addition, I have further specialized in working with very young children and their parents, people diagnosed with autism spectrum disorders, and in providing trauma therapy (including for people with autism spectrum disorders).
My practice is within the basic mental health care sector and treats mild mental health issues. I cannot accept highly complex, or crisis-prone problems.
I am registered in the BIG register and affiliated with the Dutch Institute of Psychologists (NIP). I work in accordance with the Child Abuse Reporting Code (Meldcode).
Treatments
Children/adolescents
Sometimes you just don't feel great, your mind is racing, thoughts are racing, and you're overwhelmed with emotions. Everyone experiences this from time to time, feeling angry, sad, or scared. Sometimes it goes away on its own, and sometimes you need some extra support, perhaps from your parents, your school, or from me. I'll work with you and your parents to find ways to help you feel better again.
Parents
When your child is not feeling well and things are not going smoothly at home or at school, this can cause a lot of concern for you as parents. It can also be a (sometimes challenging) search to find the best way to help your child feel better and more at ease again. I am happy to support you in this process, so that you can move forward together again as soon as possible. I like to think along with you and can offer support either for a short period or for a longer time if needed.
Adults
For adults, I offer trauma treatment in the form of EMDR and directive writing therapy.
When you have experienced something frightening, distressing, or overwhelming, it can sometimes be difficult to process these events on your own. The memories may remain associated with painful emotions, and you may experience symptoms such as avoidance, feeling stuck, intense emotions, and difficulties with sleeping or falling asleep.
I provide treatment for single-incident trauma, for example after experiencing an accident, illness, loss, childbirth trauma, bullying, violence, or strong anticipatory fears (such as fear of driving or giving presentations).
Treatments
I offer treatment for: (performance) anxiety, mood problems, low self-esteem, emotional regulation difficulties such as sadness or angerissues, parent–child interaction problems, coping with loss or grief, autism-related questions and parenting concerns.
For trauma-related symptoms in (very) young children and in children or adolescents with pre-verbal trauma, I offer EMDR or Storytelling therapy. I also provide adapted EMDR for individuals with an Autism Spectrum diagnosis.
My approach includes several therapeutic approaches, including Cognitive Behavioral Therapy (CBT), EMDR/Storytelling or writing therapy, play therapy, systemic therapy, and solution-focused therapy.
I work from a systemic perspective, which means that I involve parents in the process and offer parental guidance and/or parenting support, either alongside the child’s treatment or separately.
I also offer psychological assessment in the form of intelligence testing (using the WISC-V). For more information, please contact me via the contact form.
Rates and reimbursement
Rates
Intake interview (60 minutes) €160
Treatment consultation (45 minutes) €135
System conversation/family conversation (45 minutes) €135
Telephone or email consultation (per 20 minutes) €45
Psychological support package €700
(intake, three conversations with the child and/or parents
and evaluation interview)
Intelligence test €750
(short intake, 1-2 assessment sessions, report and
conversation for feedback)
Children
At the moment, appointments for children under 18 are unfortunately not reimbursed in my practice. This is because municipalities are currently no longer issuing contracts to independent practices.
This means that the costs must be fully paid out of pocket.
Adults (18+)
For 2026, I have not signed contracts with health insurers. This means that I work as a non-contracted healthcare provider.
I advise you to contact your health insurance company before registering and ask what percentage is reimbursed for a non-contracted healthcare psychologist (GZ-psychologist) in primary mental healthcare (basic GGZ). The health insurer will deduct the reimbursement from your mandatory deductible (eigen risico).
You will receive a monthly invoice that clearly states which consultations took place and what the costs are. You will need to pay the invoice yourself, after which you can submit it to your health insurer for reimbursement.
The amount reimbursed depends on your insurance policy:
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With some restitution policies, a large part of the NZa rate may be reimbursed.
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With in-kind (natura) or combination policies, a lower percentage is often reimbursed.
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The exact reimbursement varies per insurer and per policy.
More information about working without contracts can be found at:
www.contractvrijepsycholoog.nl.
Register for treatment
You can register yourself or your child for treatment using the registration form. After registering, you will be contacted by phone within a week for a brief introductory meeting, after which an intake interview can be scheduled. After this, we will determine the most appropriate treatment together. You do not need a referral for registration.
You can fill in the details on the registration form below.
If you are divorced parents with shared custody, both parents will be asked for permission for research and/or treatment until the age of 16.
Waiting time – update March 2026: none
The next intake interviews can be scheduled in April 2026.
For other independent care providers in the region, see www.zzpjeugdggzhaaglanden.nl
Agreements & conditions
Appointments & Terms
I believe it is important to make clear and careful agreements. Below you will find the most important conditions regarding appointments, cancellations, and payment.
Appointments and cancellations
Appointments can be cancelled free of charge up to 24 hours in advance. If an appointment is cancelled within 24 hours or if an appointment is missed (no-show), the full fee will be charged.
Payment
After the appointment, you will receive an invoice by email. The payment term is 14 days. If payment is not received within this period, a payment reminder will be sent and administrative costs may be charged.
Minors
For underaged clients, parents or caregivers are actively involved in the treatment. Appointments and conditions are discussed and agreed upon with parents or caregivers in advance.
Complaints
Are you dissatisfied with something or do you have a complaint about my care? I would be happy to discuss this with you and work together to find a solution.
If you do not wish or are unable to discuss your complaint with me directly, or if you would prefer independent support, you can contact Klachtenportaal Zorg. Klachtenportaal Zorg is an external organization with which I am affiliated to help resolve dissatisfaction and complaints regarding my care.
After submitting your complaint or concern, Klachtenportaal Zorg will assess whether it meets the conditions for handling and which procedure applies. If information is missing or unclear, they will contact you to complete the information and ensure that the complaints procedure can be properly initiated.
Would you like advice on how to deal with a situation you are dissatisfied with? You may also contact Klachtenportaal Zorg for advice without immediately starting a formal procedure.
You can submit your complaint using the complaint form on the Klachtenportaal Zorg website. You may also send an email to info@klachtenportaalzorg.nl. If you are unsure which complaints procedure applies to you, Klachtenportaal Zorg can also assist you with this. The aim is always to resolve dissatisfaction and complaints.
Questions
If you have any questions about appointments or terms, please feel free to contact me by email or telephone.
Contact
Phone number: 06-38106296
Email: contact@margrietharmsenpsychologie.com
Address: Eisenhowerlaan 114, 2517 KM, The Hague
Chamber of Commerce number: 99602385
Clinical psychologist BIG: 29931042225
ABG practice:
AGB care provider:
I am unavailable outside office hours and during school holidays. If you have any questions, concerns, or are experiencing an emergency, please contact your GP (or the GP Out-of-Hours Service).
