Hyperplasia of renal artery

This code signifies an abnormal increase in the number of cells within the renal artery, leading to a thickening of its walls. This cellular proliferation can narrow the artery, potentially impeding blood flow to the kidney. It is a pathological finding, not a functional disorder.

This code is appropriate for documenting a diagnosis of renal artery hyperplasia, often identified during imaging studies such as angiography or ultrasound, or through pathological examination of tissue. Documentation should clearly state "hyperplasia of renal artery" or similar findings. It is commonly associated with renovascular hypertension.

• Differentiate from renal artery stenosis (401.0-401.9, 440.1) unless the hyperplasia is explicitly stated as the cause of the stenosis.
• Ensure documentation specifies "hyperplasia" and not just "thickening" without further pathological confirmation.
• Consider sequencing with codes for associated conditions like hypertension (401.x) if the hyperplasia is contributing to it.