Rapidly progr nephritic syndrome w dense deposit disease

This code signifies a severe and rapidly worsening form of kidney inflammation (nephritic syndrome) specifically linked to dense deposit disease. Dense deposit disease is a rare kidney disorder characterized by abnormal deposits of complement proteins within the kidney's filtering units (glomeruli), leading to impaired kidney function. The "rapidly progressive" aspect indicates a swift decline in renal function, often leading to end-stage renal disease if untreated.

Use this code when documentation clearly states a diagnosis of rapidly progressive nephritic syndrome and explicitly identifies dense deposit disease as the underlying etiology. Supporting documentation would include pathology reports confirming dense deposit disease, evidence of rapidly declining glomerular filtration rate (GFR), and clinical signs of nephritic syndrome such as hematuria, proteinuria, and hypertension.

• Ensure documentation explicitly links the rapidly progressive nephritic syndrome to dense deposit disease; do not assume the connection.
• Distinguish this from other forms of rapidly progressive glomerulonephritis (RPGN) where dense deposit disease is not specified as the cause.
• Code any associated manifestations or complications, such as chronic kidney disease stage, in addition to this primary diagnosis.