Pyeloureteritis cystica

This code represents a rare, benign inflammatory condition affecting the lining of the renal pelvis and ureter, characterized by the presence of multiple small cysts or polyps. These lesions are typically filled with fluid or mucin and result from chronic irritation or infection.

Use this code when documentation explicitly states a diagnosis of pyeloureteritis cystica. This diagnosis is often made incidentally during imaging studies (e.g., CT urogram, MRI) or endoscopic procedures (e.g., ureteroscopy) performed for other urinary tract symptoms.

• Ensure the documentation clearly specifies "pyeloureteritis cystica" and not a generic inflammatory condition of the kidney or ureter.
• Investigate if there are any underlying infectious processes (e.g., chronic urinary tract infection) that should be coded as a secondary diagnosis.
• Do not confuse with simple renal cysts or ureteral polyps that are not explicitly described as "cystica."