N103 – Craniotomy plus excision - supratentorial
OHIP Otolaryngology Code — NEUROLOGICAL SURGICAL PROCEDURES · Schedule of Benefits
This code is for a craniotomy with excision of a supratentorial lesion, specifically for astrocytoma, oligodendroglioma, glioblastoma or metastatic tumour. It is listed under Neurological Surgical Procedures. As per the General Preamble, this service includes all common and specific surgical elements, such as pre-operative evaluation, the surgical procedure itself, and immediate post-operative care. The fee is payable only to the physician who personally rendered the service or supervised it according to delegation rules. Claims must be submitted with the appropriate suffix: 'A' for the surgeon, 'B' for an assistant, and 'C' for the anaesthetist.
When to Use
- Use N103 for the surgical resection of primary supratentorial gliomas such as glioblastoma, astrocytoma, or oligodendroglioma.
- Use N103 for the excision of a single or solitary supratentorial metastatic brain tumor.
Common Pitfalls
- Do not bill N103 for biopsy-only procedures; these should be coded under specific biopsy codes rather than excision codes.
- Avoid billing N103 in conjunction with other craniotomy codes for the same lesion, as the fee is intended to be comprehensive for the primary excision.
- Failure to append the E901 premium code when an operating microscope is utilized results in the loss of the $252.40 additional fee.
Billing Tips
- Always ensure the E901 microscope premium is submitted on the same claim as N103 to capture the full procedural value for microsurgical resections.
- Verify that the surgical report clearly specifies the supratentorial location and the pathology to support the use of N103 over infratentorial or non-excision neurological codes.
Effective: April 1, 2026
X. Neurological Surgical Procedures
NEUROLOGICAL SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
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