Cyst of kidney, acquired

This diagnosis code signifies the presence of a non-cancerous, fluid-filled sac within the kidney that developed after birth. It represents an isolated, acquired renal cyst, distinct from inherited or developmental cystic kidney disorders.

Apply this code when documentation clearly states "acquired renal cyst," "simple renal cyst," or "renal cortical cyst" without evidence of a congenital origin or polycystic kidney disease. This is commonly identified incidentally on imaging studies such as ultrasound, CT, or MRI.

• Do not use this code for congenital cystic kidney diseases; refer to codes in category Q61.-.
• Ensure documentation specifies "acquired" or implies non-congenital origin; otherwise, query the provider.
• Distinguish from polycystic kidney disease (PKD), which involves multiple cysts and is typically hereditary.