Chronic nephritic syndrome w diffuse membranous glomrlneph

This code signifies a persistent, long-standing inflammation of the kidney's filtering units (glomeruli) characterized by a widespread thickening of the glomerular basement membrane due to immune complex deposition. This chronic condition leads to impaired kidney function and often presents with proteinuria, hematuria, and hypertension.

Apply this code when documentation clearly indicates a diagnosis of chronic nephritic syndrome, specifically identifying diffuse membranous glomerulonephritis as the underlying pathology. This diagnosis is typically confirmed by renal biopsy findings.

• Ensure the documentation specifies "chronic" and "diffuse membranous" to differentiate from acute or other forms of glomerulonephritis.
• Do not use this code for acute or rapidly progressive glomerulonephritis; refer to codes within the N00-N02 series.
• Code any associated chronic kidney disease (CKD) stage separately, as appropriate.