Hyperplasia of appendix

This code signifies an abnormal increase in the number of normal cells lining the appendix, leading to an enlargement of the organ. This cellular proliferation is typically benign and can be a precursor to other appendiceal conditions or an incidental finding.

Assign this code when documentation explicitly states hyperplasia of the appendix, often identified during imaging studies, endoscopy, or histopathological examination of an appendectomy specimen. It is appropriate for both symptomatic and asymptomatic cases where this specific diagnosis is confirmed.

• Differentiate from appendicitis (K35.-) or other inflammatory conditions; hyperplasia is a distinct pathological finding.
• Ensure documentation specifies "hyperplasia" and not merely "enlargement" without a confirmed cellular basis.
• Consider sequencing if other appendiceal conditions (e.g., mucocele, neoplasm) are also present, as hyperplasia may be an associated finding.