Other ascites

This code signifies the presence of abnormal fluid accumulation within the peritoneal cavity, not specified as malignant. It represents ascites that is not directly attributable to a cancerous process.

Use this code for ascites documented as non-malignant, idiopathic, or when the underlying cause is known but does not have a more specific ICD-10-CM code for ascites (e.g., ascites due to heart failure, but the documentation only states "ascites"). Documentation should clearly state "ascites" and rule out malignancy or provide an unspecified etiology.

• Always code the underlying cause of ascites first, if known and documented.
• Do not use this code if the ascites is explicitly documented as malignant; use codes from category C78.6.
• Distinguish from localized fluid collections or effusions in other body cavities.