My father age 60, diabetic patent since 15 years, creatinine level is 5.1 and urea 93. kidney size is 8.8x3.4 and 8.9x4.2. I know his kidney is affected. I would like to know he is what stage , what is the treatment required & what is the next process. his BP is normal , he has no other problem now. he was consuming alchocal for 30 years now last 15 days he stopped. Kindly suggest.