Nephrology Associates, P.C. We are the largest renal care provider in Nashville, Tennessee. Our 22 nephrologists and 6 nurse practitioners care for 1,200 hemodialysis and 200 peritoneal dialysis patients in 20 outpatient clinics. We are committed to the efficient performance of phase II through IV clinical trials by providing rapid enrollment, timely and accurate data recording, and most importantly, the highest quality of patient care available.