A nephrologist is a specialist who treats diseases of the kidney, including care for: DiabetesDialysis PatientsPeritoneal Dialysis PatientsAll Forms of Kidney DiseaseCongenital Kidney DiseaseKidney Transplant PatientsElectrolyte ProblemsKidney StonesMetabolic Kidney DiseaseRenal Vascular PatientsHigh Blood Pressure PatientsExpectant Mothers with Kidney Disease