Inflammation of the kidney's filtering units that may impair the kidneys' ability to remove waste.
Because the rating turns on your GFR and how long it has stayed at a given level, laboratory records are the foundation of your evidence. You need GFR or estimated GFR results, or creatinine-based approximations, calculated by a medical professional, showing readings across at least 3 consecutive months within the past 12 months. If your GFR is in the 60 to 89 range, records showing urinalysis results with RBC, WBC, or granular casts, imaging or biopsy findings showing structural kidney abnormalities, or urine albumin/creatinine ratio results of 30 mg/g or higher for the same period would support a 0% rating.
For higher rating levels, dialysis records or documentation of transplant eligibility would support a 100% rating. Treatment notes, nephrology visit records, and hospital records help establish how long reduced kidney function has been present. Statements from you or people who know you describing how your symptoms affect work and daily life can round out the picture, especially when your records show borderline values or gaps between lab draws.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.
