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E311
E311 – Exostosis - endomeatal surgery and removal and drilling out of exostosis
OHIP Surgical Assists Code — AURAL SURGICAL PROCEDURES · Schedule of Benefits
This service involves the surgical removal of an exostosis, which is an abnormal bone growth within the ear canal. The procedure is performed through the ear canal (endomeatally) and includes drilling out the exostosis.
When to Use
- Use E311 for the surgical removal of symptomatic exostoses via drilling when the procedure is strictly endomeatal.
- Use E311 when the clinical objective is the mechanical removal of bony canal obstruction rather than the management of soft tissue pathology or simple biopsy.
Common Pitfalls
- Billing E311 in conjunction with Z903 (Myringotomy) or other ear procedures without verifying the Schedule of Benefits for mandatory 'multiple procedure' reduction rules.
- Confusing E311 with E312 (Exostosis - removal of, requiring post-auricular approach), as the surgical approach dictates the code selection rather than the pathology itself.
Billing Tips
- Ensure the operative report explicitly details the endomeatal approach and the use of a drill to justify the specific procedural requirements of E311.
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