Ureteritis cystica

Ureteritis cystica is a rare, benign, chronic inflammatory condition characterized by the formation of multiple small, fluid-filled cysts within the lining of the ureter. These cysts are typically a result of chronic irritation or infection, leading to glandular metaplasia of the urothelium. While usually asymptomatic, larger cysts can cause urinary obstruction or hematuria.

This code is appropriate when documentation explicitly states a diagnosis of "ureteritis cystica." It is often identified incidentally during imaging studies (e.g., CT urogram, retrograde pyelogram) or endoscopic procedures (ureteroscopy). Supporting documentation should detail the presence of cystic changes within the ureteral wall.

• Differentiate from other ureteral lesions such as polyps, tumors, or strictures, which have distinct codes.
• Code any underlying conditions contributing to chronic irritation or infection, such as recurrent urinary tract infections (UTIs) or nephrolithiasis, as additional diagnoses.
• Ensure the documentation specifies "cystica" to avoid confusion with general ureteritis (N28.89).