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E327
E327 – Closure of mastoid fistula
OHIP Surgical Assists Code — Y. Ocular and Aural Surgical Procedures · Schedule of Benefits
This surgical procedure involves the closure of a mastoid fistula. The fee is for the surgeon's service (A suffix). Assistant (B suffix) and anaesthetist (C suffix) services are billed separately based on basic and time units specified in the Schedule of Benefits.
When to Use
- Use E327 specifically for the surgical closure of a post-mastoidectomy fistula or persistent aural discharge tract that has failed conservative management.
- Select E327 when the procedure is limited to the closure of the fistula tract, distinguishing it from more extensive revision mastoidectomy procedures like E325 or E326.
Common Pitfalls
- Attempting to bill E327 with a second surgical assistant will result in rejection, as this code is not on the approved list for dual-assistant coverage.
- Failing to apply the correct age-based premium (e.g., for patients under 16 years) will lead to underpayment, as these are not automatically calculated by the system.
Billing Tips
- Ensure the operative report clearly distinguishes the fistula closure from any concurrent mastoid revision to justify the use of E327 over more complex mastoidectomy codes.
- When performing this procedure after hours, ensure the claim includes the appropriate E400-series premium, as the base fee for E327 does not include emergency or after-hours adjustments.
Provider Fee$252.15
Surgical Assistant Fee$75.06
Anaesthetist Fee$154.90
Non-Anaesthetist Fee$154.90
Effective: April 1, 2025
Category
Y. Ocular and Aural Surgical Procedures
Subcategory
Y. Ocular and Aural Surgical Procedures
Service Type
Surgical
Code Classes
Ocular and Aural Surgical Procedures
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