My 21 month old daughter has scaring on her kidney, her creatine level is 0.549 and the kidney specialist believe that her kidney is functioning at 50-65%. They also labeled her as being in 2nd Stage Kidney Disease, can you help me understand why this may be. She was just placed on 0.1 mL of Calcitriol.
Your description is rather incomplete. We need to have more details to really comment on was exactly is the condition that your daughter is suffering from. The way you describe may suggest chronic pyelonephritis(infection in kidneys) which have led to scarring. Further, for a stage two kidney disease, the GFR u say is appropriate, and the creatinine level may be absolutely normal.  She should get CKD management therapy like calcitriol and also avoid further episodes of infection.