Chronic nephritic syndrome with dense deposit disease

This code signifies a persistent and severe form of kidney inflammation (nephritis) characterized by the abnormal accumulation of electron-dense material within the glomerular basement membrane. This deposition disrupts normal kidney function, leading to proteinuria, hematuria, and progressive renal impairment.

Apply this code when documentation explicitly states a diagnosis of chronic nephritic syndrome and specifies dense deposit disease (DDD) as the underlying cause. This diagnosis is typically confirmed through renal biopsy findings demonstrating the characteristic dense deposits.

• Ensure the documentation clearly distinguishes between acute, subacute, and chronic forms of nephritic syndrome.
• Do not confuse dense deposit disease with other forms of membranoproliferative glomerulonephritis (MPGN) unless specifically documented.
• Code any associated chronic kidney disease (CKD) stages separately as a secondary diagnosis.