Pyeloureteritis cystica

This code signifies an inflammatory condition affecting the renal pelvis and ureter, characterized by the presence of multiple small, benign cysts or polyps within the mucosal lining. These cystic formations are typically a result of chronic inflammation, often associated with recurrent urinary tract infections.

Use this code when documentation explicitly states "pyeloureteritis cystica" or describes the characteristic cystic changes within the renal pelvis and ureter due to inflammation. This diagnosis is typically made via imaging studies such as CT scans or retrograde pyelography, or during endoscopic procedures like ureteroscopy.

• Ensure the documentation clearly specifies both "pyelitis" (renal pelvis inflammation) and "ureteritis" (ureter inflammation) with cystic changes.
• Investigate underlying causes, such as chronic urinary tract infections, and code them as secondary diagnoses if documented.
• Do not confuse with simple pyelitis or ureteritis without the distinct cystic component.