K66.2 is the ICD-10 code for Retroperitoneal fibrosis. It is a four-character subcategory of K66 (Other disorders of peritoneum), the most specific level in the WHO edition. It belongs to the block K65–K67 (Diseases of peritoneum) in Chapter XI, Diseases of the digestive system.
- Code type
- Subcategory (4 characters)
- Chapter
- XI · K00–K93
- Classification
- WHO ICD-10, 2019 version
What K66.2 includes
Conditions and terms that are coded here.
- Ormond’s disease
K66.2 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
K66.2Retroperitoneal fibrose
K66.2Retroperitonealfibrose
K66.2Fibrose rétropéritonéale
K66.2retroperitoneale fibrose
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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