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E331
E331 – Revision stapedectomy
OHIP Surgical Assists Code — Y. Ocular and Aural Surgical Procedures · Schedule of Benefits
Revision stapedectomy is a surgical repair procedure performed on the inner ear. The amount payable for this service is for the surgeon (suffix A). Fees for anaesthesia (suffix C) and surgical assistance (suffix B) are calculated separately based on a system of basic and time units. While no assistant units are listed for this procedure, assistance may be claimed on an independent consideration basis under fee code M400B.
When to Use
- Use E331 for the surgical revision of a previously performed stapedectomy or stapedotomy due to failure, displacement, or recurrent conductive hearing loss.
- Use E331 when performing a secondary procedure to address complications such as prosthesis migration or fibrous adhesions following an initial stapes surgery.
Common Pitfalls
- Do not bill E331 for a primary stapedectomy; the primary procedure is typically covered under different codes such as E321.
- Failure to provide a detailed letter of medical necessity when submitting M400B for surgical assistance will result in automatic rejection, as E331 does not have pre-assigned assistant units.
Billing Tips
- Ensure the anaesthesiologist bills using the 6 basic units assigned to E331 when calculating their total fee units.
- If surgical assistance is required, submit M400B with a clear, concise letter from the surgeon justifying the necessity of the assistant for this specific revision case to ensure independent consideration approval.
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