Isolated proteinuria with minor glomerular abnormality

This code signifies the presence of protein in the urine (proteinuria) without other significant signs of kidney disease, specifically when a kidney biopsy reveals only minor structural changes to the glomeruli. It indicates a mild form of glomerular dysfunction where the filtering units of the kidney are slightly abnormal but not severely damaged.

Apply this code when a patient presents with persistent proteinuria, and a renal biopsy has been performed, confirming only minor glomerular abnormalities. Documentation should explicitly state "isolated proteinuria" and reference the biopsy findings of "minor glomerular abnormality" or similar mild changes.

• Ensure documentation specifies "isolated" proteinuria and confirms minor glomerular changes, often from a biopsy report.
• Do not use this code if other significant kidney pathologies, such as nephrotic syndrome or chronic kidney disease stages, are present.
• Consider sequencing this code as a primary diagnosis when the isolated proteinuria is the main reason for the encounter and investigation.