ICD-10 Code K38.2 – Diverticulum of appendix (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K38.2 – Diverticulum of appendix
What it is
K38.2 identifies a diverticulum arising from the appendix, meaning a small pouch or outpouching in the appendiceal wall. It is a specific anatomic diagnosis, not a general appendicitis code.
Clinical signs
Clinical features vary; refer to documentation. Patients may be asymptomatic, or imaging, surgery, or pathology may note an appendiceal diverticulum incidentally.
When to use this code
Use K38.2 when the provider documents diverticulum of the appendix, whether found incidentally or as the stated diagnosis. Code it when the record specifically identifies the appendiceal diverticulum rather than nonspecific right lower quadrant pain or appendicitis. If the report is unclear, check documentation.
Do not use for
Do not use this code for appendicitis, appendiceal abscess, or other appendiceal disorders unless a diverticulum is specifically documented. Do not assign it for diverticula in other bowel segments.
Coding tip
Code only when the appendix is named explicitly; if the source says “appendiceal lesion” or “abnormal appendix,” verify the exact diagnosis first.