Rapidly progr neph syndrome w diffuse membranous glomrlneph

This code signifies a severe and rapidly worsening form of kidney inflammation characterized by the rapid decline of renal function, often leading to end-stage renal disease within weeks or months. It specifically identifies cases where the underlying pathology is diffuse membranous glomerulonephritis, a condition affecting the filtering units of the kidneys.

Use this code when documentation explicitly states "rapidly progressive nephritic syndrome" and specifies "diffuse membranous glomerulonephritis" as the histological finding. This typically applies to patients presenting with acute renal failure, hematuria, proteinuria, and red blood cell casts, with biopsy confirmation of the specific glomerular lesion.

• Ensure documentation clearly distinguishes between rapidly progressive and other forms of nephritic syndrome.
• Verify that "diffuse membranous glomerulonephritis" is explicitly stated, not just "membranous glomerulonephritis."
• Code any associated underlying systemic diseases (e.g., lupus) as additional diagnoses.