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Do you have a complaint?

Everything to do with your health insurance policy is well organised. You can count on that. But there may still be something you find unsatisfactory. In such cases you can ask ONVZ to reconsider a decision. We take every complaint seriously, and consider the handling of complaints  to be a high-priority task. This enables us to further improve our services.

Complaints and disputes

If you are dissatisfied with our service or a decision that we have made, please let us know by submitting a complaint or sending a letter to:

T.a.v. Cliëntenservice
ONVZ Zorgverzekeraar
Postbus 392
3990 GD  Houten

Handling your complaint

We will handle your complaint within 30 days of receiving of your complaint form or letter. If, however, this should take longer, you will receive prompt notification of this.


Tel +31 (0)30 639 62 22

Mon-Fri 08:30 - 21:00

Full contact details
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