ICD-10 Code K63.9 – Disease of intestine, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K63.9 – Disease of intestine, unspecified
What it is
K63.9 is used when the record documents a disease of the intestine, but the specific intestinal disorder is not named. It signals an unspecified intestinal condition rather than a defined diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Patients may have nonspecific abdominal or bowel complaints, but the chart must support an intestinal disease rather than a symptom alone.
When to use this code
Use K63.9 when the provider identifies an intestinal disorder and no more specific diagnosis is documented. It may fit incomplete records, late coding, or situations where the exact condition remains undetermined. If the note names a specific intestinal disease, code that diagnosis instead.
Do not use for
Do not use this code for isolated symptoms such as abdominal pain, diarrhea, or constipation without a documented intestinal disease. Also avoid it when a more specific intestinal diagnosis is stated in the record.
Coding tip
Check the assessment and final diagnosis first; unspecified codes should be a fallback only when the provider does not document a more precise intestinal condition.