N06: Isolated proteinuria with specified morphological lesion

N06.5: Isolated proteinuria with specified morphological lesion : diffuse mesangiocapillary glomerulonephritis

The body needs proteins to be able to work properly. So the body normally only excretes very small amounts of protein via urine.

There are a number of different reasons why someone might excrete too much protein in their urine. For example, the kidneys may not be able to filter proteins properly. This can happen, for example, if there are changes to the kidney tissue. It is also possible that you have too much protein in your blood. Protein can sometimes be passed in urine as a result of strenuous physical exertion, too. People do not usually have any symptoms in these cases.