Corrective surgery for nipples?

I'm 18 and am having breast reduction surgery, but haven't gone for a consultation since I was 15. My referral was sent and I'm just waiting for the call for a new consultation. The entire cost will be covered, but I also want corrective surgery because I have inverted nipples. I know that about 10% of women have them, and mine aren't severe, but I am very self-conscious about them and am afraid that it will be difficult to breast feed when I eventually have children. How much would it cost?