Hi-
I wonder what clinical evidence makes your doc think the kidney issue isn't related to your AI disease. Has he done any extensive testing? I'm no doc, but if I were you I would insist on a referrel to a neph. I have lupus nephritis and they key to successful treatment and better outcomes is early detection and treatment. If you have a falling GFR you probably need a kidney biopsy to determine whether or not it is related. Really, whether it's related or not is a moot point. Kidney issues need to be addressed quickly! Run don't walk to your nearest nephrologist! Keep us updated. Hope you feel better soon. God Bless you, Judi
P.S.- I hope I don't sound like a "know it all". I've been down this road. I have ESRD. It's not a pleasant trip. Take care of yourself and advocate for yourself.