N110 – Lobectomy and/or excision of cortical scar for epilepsy
OHIP Otolaryngology Code — NEUROLOGICAL SURGICAL PROCEDURES · Schedule of Benefits
Lobectomy and/or excision of cortical scar for epilepsy. This is a major surgical procedure performed under anaesthesia and may require a surgical assistant. As a surgical service, it includes specific elements such as patient preparation, the procedure itself, post-operative care, and arranging follow-up, in addition to the common elements applicable to all insured services as outlined in the Schedule of Benefits. See - for details on surgical, assistant, and anaesthesia services.
When to Use
- Use N110 for the surgical resection of a defined epileptogenic focus, such as a temporal lobectomy, specifically in patients with medically refractory epilepsy.
- Use N110 when performing a focal cortical resection to excise a documented cortical scar or lesion identified as the source of seizure activity.
Common Pitfalls
- Do not bill N110 for diagnostic procedures like stereotactic EEG or grid placements; these require separate, specific neurosurgical codes.
- Failure to document the specific epilepsy diagnosis and the surgical necessity of the resection in the operative report is a primary cause for audit recovery.
Billing Tips
- Ensure that age-based fee premiums are applied correctly for pediatric patients under 16, as these are calculated as a percentage increase on the N110 base fee.
- If the procedure is performed on an emergency basis after hours, ensure the appropriate E-series premium (E409 or E410) is appended to the claim to capture the 50-75% procedural increase.
Effective: April 1, 2026
X. Neurological Surgical Procedures
NEUROLOGICAL SURGICAL PROCEDURES
Surgical
Neurological Surgical Procedures, Surgical Assistants' Services, Anaesthesiologists' Services
As per , all insured services must be documented in appropriate records establishing that an insured service was provided, the service for which the account is submitted is the service that was rendered, and the service was medically necessary.
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