Neither I nor the National Kidney Foundation provide referrals. I suggest that you contact your primary care physician (PCP) in your area and ask for a referral. You should have further testing to determine why you are passing so many stones. A nephrologist may be able to test you and determine the cause of repeated stone episodes and deal with your kidney disease, but removal and treatment of existing stones is best handled by a urologist.
For general information you may find helpful please click here.