Diabetic nephropathy is a kidney disease caused by diabetes. The main clinical manifestations of diabetic nephropathy usually include varying degrees of increased urine protein. Severe cases may also present with lower limb edema and reduced kidney function. As for which department to consult for diabetic nephropathy, it depends on the severity of the condition. In the early stages of diabetic nephropathy, if there is only a slight increase in urine protein and the chronic kidney disease is at stage one or two, patients can choose to see a specialist in the endocrinology department for diabetic nephropathy. Once the condition of diabetic nephropathy worsens, progressing to stage three or above of chronic kidney disease, and the patient also has significant increases in urine protein, decline in kidney function, and the onset of anemia, it is advisable to seek treatment in a nephrology department.