Unsp neph syndrome w diffuse mesangial prolif glomrlneph

This code signifies a form of nephritic syndrome where the specific cause is not documented, but a kidney biopsy has revealed diffuse mesangial proliferative glomerulonephritis. This condition involves inflammation and proliferation of mesangial cells within the glomeruli, leading to impaired kidney function, often presenting with hematuria, proteinuria, hypertension, and edema.

Apply this code when the medical record explicitly states "unspecified nephritic syndrome" and a biopsy report confirms "diffuse mesangial proliferative glomerulonephritis." This is appropriate when a more specific underlying etiology for the nephritic syndrome (e.g., post-infectious, IgA nephropathy) has not been determined or documented.

• Ensure documentation clearly links the unspecified nephritic syndrome to the biopsy-confirmed diffuse mesangial proliferative glomerulonephritis.
• Avoid using this code if a more specific type of nephritic syndrome (e.g., N00-N07 with a more precise fourth character) is identified.
• Sequence this code as the primary diagnosis when it is the reason for the encounter or hospitalization, unless an underlying systemic disease is clearly identified as the primary cause.