Hi, It is important to know current creatinine levels which will give an insight into the functioning of the kidney. The amount of albumin and proteins leaking in urine are also important. Kidney disease or damage that occurs in people with diabetes is called diabetic nephropathy. This condition is a complication of diabetes. In people with diabetes, the nephrons slowly thicken and become scarred over time. The kidneys begin to leak and protein (albumin) passes into the urine. When kidney damage is caught in its early stages, it can be slowed with treatment. Once larger amounts of protein appear in the urine, kidney damage will slowly get worse. If the second doctor has seen through the reports then he might be confident of making a diagnosis and wants to start treatment based on laboratory reports. Some doctors might wait for biopsy reports.