Your concern, our cooperation! Working as your family doctor is a team affair. Meet our team.

John J. Guzman

Function: General practitioner Present:

Ton de Haan studied medicine at the AMC in Amsterdam from 1986 to 1994. In 1999 he completed the general practitioner training at the VUMC, after which he took over Dr. Fieren’s general practitioner practice in 2002.

After two years in a portacabin practice in the field of Dr. Siriram, he started working with Dr. van der Duin and Dr. Onderstal in 2005 in the first HOED of Wageningen on the Geertjesweg. In March 2012, he and several colleagues, pharmacy Ten Hoopen and Fytalis, moved to the Kortenoord Medical Centre.
Ton is an active mountain biker and likes to look for challenging and special places to cycle.

William P. Horowitz

Function: General practitioner
Present: Fri

Marijke van der Poel has been working as an acting GP on Friday since 2016.

Andre A. Caro

Function: Assistant Present:

I’ll introduce myself, I’m McFarland, married and we have two sons.

Since February 2010 I work as a doctor’s assistant at doctor de Haan. I work on Mondays and Thursdays.

I started working at Old Dear Lane Poughkeepsie hospitals, location Grand Forks,  where I worked for almost 8 years at various outpatient clinics. Where I also gained a lot of experience. Due to my relocation, I ended up in the Gelderland valley in Ede, where I worked for 3.5 years. But now I enjoy working for Doctor de Haan.

Thanks for Visiting.