Unspecified nephritic syndrome with dense deposit disease

This code represents a form of nephritic syndrome characterized by the abnormal accumulation of electron-dense material within the glomerular basement membrane, specifically dense deposit disease (DDD). It indicates a kidney disorder involving inflammation of the glomeruli, leading to impaired kidney function, proteinuria, and hematuria, where the specific type of nephritic syndrome is not further specified beyond the presence of DDD.

Use this code when documentation clearly identifies "dense deposit disease" as the underlying cause of an unspecified nephritic syndrome. This code is appropriate when the provider has diagnosed DDD but has not specified the exact type of nephritic syndrome (e.g., acute, rapidly progressive). Supporting documentation should include pathology reports confirming dense deposit disease.

• Do not use this code if a more specific type of nephritic syndrome (e.g., acute, chronic) is documented alongside dense deposit disease.
• Ensure the documentation explicitly states "dense deposit disease" to support the use of this code.
• Consider co-coding with codes for associated manifestations like chronic kidney disease (CKD) if present and documented.