Was Going To Have Hip Replacement Surgery And Because My

Was going to have hip replacement surgery and because my white cells is elevated they have cancelled it. Says I have to get it checked out first. What could be wrong? and what kind of doctors should I get my MD refer me to to see what is wrong. I'm in Lindsay Ontario and need a name?
Who can I get to look into this situation. A doctor name from Lindsay so my doctor can referral me to this doctor