Secondary membranous nephropathy with nephrotic syndrome

📋Clinical Description

This code signifies a kidney disorder characterized by immune complex deposition in the glomerular basement membrane, leading to significant proteinuria, hypoalbuminemia, hyperlipidemia, and edema. It specifically identifies cases where the membranous nephropathy is a consequence of another underlying condition, and the patient is experiencing the full constellation of symptoms associated with nephrotic syndrome.

🎯When to Use

Apply this code when documentation clearly indicates secondary membranous nephropathy, such as that caused by systemic lupus erythematosus, hepatitis B/C, or certain medications, and the patient presents with clinical and laboratory findings consistent with nephrotic syndrome (e.g., proteinuria >3.5 g/day, serum albumin <3.0 g/dL). This code requires explicit physician documentation of both the secondary nature of the membranous nephropathy and the presence of nephrotic syndrome.

💡Coding Tips

Always code the underlying secondary condition first, followed by this code.
Distinguish carefully from primary (idiopathic) membranous nephropathy with nephrotic syndrome.
Ensure documentation specifies "secondary" to avoid confusion with other forms of membranous nephropathy.

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Clinical Notes

Code first

, if applicable, other disease or disorder or poisoning causing membranous nephropathy

Use additional code

code, if applicable, for adverse effect of drug causing membranous nephropathy

Code Hierarchy

▲N04.2Nephrotic syndrome w diffuse membranous glomerulonephritis

N04.22(current)

Same Category

N04Nephrotic syndrome N04.0Nephrotic syndrome with minor glomerular abnormality N04.1Nephrotic syndrome w focal and segmental glomerular lesions N04.2Nephrotic syndrome w diffuse membranous glomerulonephritis N04.20Nephrotic syndrome with diffuse membranous glomrlneph, unsp N04.21Primary membranous nephropathy with nephrotic syndrome