Filter pages

Hi! I’m creating a website in which i have various types of doctors. In every province there a maximum of 3 doctors for every type. This is what the site structure looks like:

– site.com/dentist/dentist-provincex/doc-a-b
– site.com/dentist/dentist-provincex/doc-c-d
– site.com/dentist/dentist-provincey/doc-e-f
– site.com/dentist/dentist-provincey/doc-g-h

– site.com/oculist/oculist-provincex/doc-a-b
– site.com/oculist/oculist-provincex/doc-c-d
– site.com/oculist/oculist-provincey/doc-e-f
– site.com/oculist/oculist-provincey/doc-g-h

Now i would like to give the users the possibility to find the doctor through a sort of filter, by combining the type of specialist and the province.

Which is the best approach?