Blood test in Katwijk.

No, in Katwijk you draw at a time slot you schedule in the Optimize app. The nearest walk-in is Winkelhof in Leiderdorp, 9 km away; there you pick a one-hour arrival window in the app and confirm you are coming.

No. You start online yourself, without a GP referral, and then pick a Katwijk location and a time slot in the Optimize app.

You draw at a location run by SCAL or Atalmedial, but you schedule and pay through Optimize, without a referral, and your results come with explanations in the Optimize app. Have a referral from your GP? Then you make the appointment with the lab itself and the results go to your GP.

At 16 locations in and around town: on the Randweg at the Atalmedial draw point and Medisch Centrum de Coepel, and beyond that in Rijnsburg, Valkenburg, Oegstgeest, Noordwijk, Voorhout and Leiden. All addresses are on this page, sorted by distance.

Yes. In Noordwijk you draw at Medisch Centrum Noordwijk on the Rederijkersplein, in Rijnsburg at the Floris V health centre on the Graaf Florislaan and in Valkenburg at the village hall or at Praktijk 71. In the app you simply pick the address that suits you best; the lab and the results are the same everywhere.

Not automatically. You draw without a referral, so your GP need not be involved: your results come with explanations in the Optimize app, and you can always take them along to a consultation yourself.

Yes. Every draw is fasted: nothing to eat or drink from midnight, only water. Appointments are therefore in the morning, until 12:00, so you only postpone breakfast. The app tells you exactly how to prepare.

Usually within 24 hours of your appointment. As soon as the lab is done, your results appear in the Optimize app, explained per value in plain language and translated into what it means for your lifestyle.