E312 – Exostosis - with multiple removal with necessary grafting
OHIP Surgical Assists Code — AURAL SURGICAL PROCEDURES · Schedule of Benefits
This procedure involves the surgical removal of multiple exostoses from the external ear. It is a more extensive version of exostosis removal, such as E311, and includes the use of grafting material to reconstruct or repair the surgical site.
When to Use
- Use E312 when multiple exostoses are removed from the external auditory canal and the surgical site requires a skin graft or other grafting material for reconstruction.
- Select E312 over E311 when the complexity of the removal and the subsequent need for grafting distinguishes the procedure from a simple excision.
Common Pitfalls
- Billing E312 without clear operative documentation of the grafting material used will lead to audit recovery, as the graft is a mandatory component of this code.
- Attempting to bill E311 and E312 together for the same ear is considered unbundling; the more extensive procedure (E312) covers the scope of the removal.
Billing Tips
- Ensure the operative report explicitly details the grafting technique, as this is the primary clinical differentiator between E312 and the lower-valued E311.
Effective: April 1, 2025
Y. Ocular and Aural Surgical Procedures
AURAL SURGICAL PROCEDURES
Surgical
Ocular and Aural Surgical Procedures
Payment for a surgical assistant (suffix B) requires authorization by a medical consultant. The claim should be submitted using fee code M400B, with basic units equal to the anaesthesia basic units (7), as per .
Ready to bill this code?
SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.