@faithfully123 welcome to Mayo Clinic Connect. So sorry to read about your experiences with kidney stones and the atrophied left kidney. When the findings are “non obstructing” stones does that mean there is nothing they can or will do about them? You mentioned sometimes there was pain and sometimes there wasn’t. How are you feeling now?
In regards to the “huge” swings in eGFR. That sure can be nerve racking! I’ve experienced that also. I found out I had “mild - moderate kidney disease” in 2005. At some point I started researching this (learned about kidney function labs, NSAIDS, the role diabetes and hypertension have, hydration & renal diet, dialysis, transplantation …..) I self referred to a nephrologist. In 2016 I noticed my eGFR was bouncing between 14 - 42. That is similar to what you described as “huge swings” in your eGFR. But overall all of mine were lower than yours. I think higher is better. Currently my eGFR has settled in the low 30’s.
That is good that you are getting established with a nephrologist. I always had the impression that nephrology is the kidney specialty and urology is the bladder specialty. Did you end up with a urologist because of your kidney stone situation? Maybe both specialists is a good idea? Hopefully it is going to be one of those things that “can’t hurt, might help”. Will you let us know how your nephrologist appointment turns out and what you learn?