Who are we?

In 2013, as two college friends (Sylke and Hannah), we started the practice De Tandem in the heart of Laken. In 2018, we welcomed our third colleague Willem and currently we are with three permanent doctors and a GP-in-training. We live and work in Brussels and feel at home in the fascinating mix of cultures, languages and people.

The Tandem stands for the doctor-patient relationship: we hope, as doctors, to cycle in the same direction as the patient and to arrive at a good approach, in mutual consultation. The road will not always be flat and straight, but detours, hills and valleys also form a beautiful landscape. Taking time for each person is important to us. In the Tandem, we are a team: the patients are known by the practice and there is regular consultation, in which we base ourselves on the current guidelines (evidence-based medicine).  

Our mother tongue is Dutch and we are also fluent in French and English. You can come to us with any health-related questions or problems. We provide both acute and chronic care to everyone between the ages of 0 and 122, regardless of culture, background, gender or philosophy of life; we assist with pregnancies, we care for people in the last phase of life, we see young children, mothers & fathers, singles, the elderly, young people, travellers, pensioners, refugees, artists, civil servants, the self-employed, ... in other words, everyone.

The enthusiasm has continued to grow into a dream where we can work together with care providers from other disciplines under one roof. And that is how BLES came into being in 2021. We hope to continue working together on good, high-quality care for every Brussels resident, with a broad perspective on health and well-being.

Welcome to De Tandem!




Positive COVID test? Please Teleconsult

Dear patient,

In order to prevent the spread of the highly contagious omicron variant in the waiting room and in the cabinet, we are asking patients who have tested positive for COVID 19 not to come in, unless absolutely necessary.

We prefer to treat you via a teleconsult. This can be requested by phone / email, mentioning the test date, test type (Ag/PCR?) and start date of the symptoms.

Thank you for your understanding



Changed telephone schedule

Dear patient,

There will be a change in the hours at which you can reach us by phone. This system will be replaced by a fixed schedule that shows which doctor will be answering your call, so you can talk to the doctor you want to reach (see schedule below). This schedule will be used as of 23/08/2021, and you will be able to call our office between 2 and 2.30 p.m.

We would like to emphasize that this contact moment is for general information purposes. For technical results (blood tests, radiology, etc.), the doctor will get in touch with you or you can make an appointment to discuss the results. In case of emergency, you can always reach us on 0486/78 65 87.

Dr. Delrue
Dr. Van Dierdonck
Dr. Depuydt
Dr. Demaerel

Thank you for your understanding,

Team De Tandem


Announcement Lieven Holvoet

We are happy and proud to welcome Lieven Holvoet in De Tandem.

For years, we've had a nice cooperation with him as a pharmacist-biologist in the lab. He's supported us day and night with his rich experience and advice.

As of 02/08, he will make a career switch and will assist De Tandem with administrative tasks, telephone reception and we can further benefit from his extensive scientific knowledge. 

Welcome Lieven!




New agenda system

On Wednesday 04/08 we will change our agenda system. This may cause problems for a few hours with online bookings.

We apologize for any inconvenience and thank you for your understanding.


Dr. Gilles Depuydt, Junior Doctor


It is our pleasure to introduce our new GP junior doctor: Dr. Depuydt!

You can make an appointment with him via the online agenda.


A quick word about himself:

"I am a young GP in training for whom the patient as a person is always at the center of every consultation. By cooperating in an active and continous way together with the doctors in the practice I hope to refine my own skills and to offer optimal care to the patients. Together, we form a team to serve all of your care needs. I have gained medical experience and experience in the humanitarian field both at home and abroad, and have always enjoyed serving the local community. I have worked in hospitals from Belgium to Paraguay, provided humanitarian aid to refugees in Calais and Brussels, and been the (head)leader of the local youth movement at my home town. Out of ofiice I am a great music fan who can always be found for tips end musical discoveries!"


Medical Practice De Tandem

Pannenhuisstraat 46

1020 Laken

Tel: 02/428.00.08

Consultations by appointment

Open from Monday till Friday

08h15 - 19h00

Make an appointment online