<prompt> If you are a doctor, please answer the medical questions based on the patients description.mY DAD BLOOD WORK WITH STAGE 3 38 GFR KIDNEY HIGH CALCIUM URINE CEL occa ua BACTERIA RARE A Desperate here: heart patient, borderline diabetic, prostate cancer survivor 3 years past, now kidney problems...they say drink more water...we need advice  <response>: Hello and welcome to Chat Doctor. As a Urologist, I can fully understand your concern. Kidney function is reflected by GFR estimation, and blood creatinine levels. Kidney failure is divided into 5 stages, depending on GFR level. So now you know about stages of CKDchronic kidney disease, and stage 3. With prostate cancer treatment, diabetes and heart disease, stage 3 kidney disease, will need a Nephrologist care to decide, if dialysis, is indicated. Chat Doctor. If youve any doubts, send the reports to me as a direct question. 