If one's kidney fxn is 14 percent, is that considered end stage renal failure? any way to reverse its course? any fluctuation possible?

GFR <15 is end stage: Kidney doctors will follow the lab results, start dialysis, and refer to the transplant team if one is eligible. Criteria for transplant can vary among medical centers and may include: end-stage renal disease, creatinine clearance at 20 or less, no active or ongoing cancers, no active infections, have reasonable heart and lung function, bmi <35, no smoking/drug-abuse/alcohol-abuse, etc...