hello and welcome to HCM! can you please highlight your past medical , surgical and drug history. It is very unusual for a 45 years old female to have such high renal function tests. Do you have any underlying chronic disease like diabetes, hypertension, etc. Did you have repeated episodes of urinary tract infections. or any chronic backache issues? any history of renal calculi(stones). I would also like to see your urine R/E report, whether there is any proteinuria(proteins in urine) or hematuria(blood in urine) also an Ultrasound of kidneys is of great importance here( kidney size, echogenecity and cortico-medullary differentiation is of importance here). serum calcium, albumin and phosphate levels should be known. Serum creatinine of 9 is really high and merits dialysis (unless it is due to dehydration and can be corrected by fluids or some other reversible cause) but the important thing is to know the cause of CKD(chronic kidney disease) and without the above mentioned test reports one cannot say for sure what the cause is.