ICD-10 Code K68.9 – Other disorders of retroperitoneum (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K68.9 – Other disorders of retroperitoneum
What it is
K68.9 is used for a retroperitoneal disorder that is not more specifically named elsewhere. The retroperitoneum is the space behind the abdominal lining, and this code covers unspecified or other conditions in that area.
Clinical signs
Clinical features vary; refer to documentation. Findings may include abdominal or flank pain, a palpable mass, or imaging evidence of retroperitoneal abnormality, but the exact diagnosis should be documented.
When to use this code
Use K68.9 when the provider documents a disorder of the retroperitoneum and no more specific code is available. It fits cases where imaging or clinical assessment identifies a retroperitoneal process, but the chart does not name a defined condition. If the record gives a specific diagnosis, code that instead.
Do not use for
Do not use this code when the condition is clearly identified as a specific retroperitoneal disease, such as infection, hemorrhage, or neoplasm. Check documentation if the chart only describes a mass or postoperative change.
Coding tip
Query for the exact retroperitoneal diagnosis before assigning K68.9, because this code is for nonspecific or other documented disorders.