N123 – Stereotaxis - intracranial
OHIP Otolaryngology Code — NEUROLOGICAL SURGICAL PROCEDURES · Schedule of Benefits
Intracranial stereotaxis is a neurosurgical procedure that utilizes a three-dimensional coordinate system to precisely locate targets within the brain. The service includes ventriculography. This technique supports minimally invasive interventions like biopsies, ablations, injections, or the implantation of devices. Add-on codes may apply: - E931: with implantation (and removal) of radioactive sources into brain tumour. - E896: with sophisticated micro-electrode recording during stereotaxis.
When to Use
- Use N123 for stereotactic-guided intracranial biopsies or device implantations where the primary procedure is not classified as functional stereotaxy.
- Use N123 when performing intracranial stereotaxis that includes ventriculography as part of the procedural workflow.
- Use N123 as the base code when implanting radioactive sources into a brain tumour, provided the criteria for add-on code E931 are met.
Common Pitfalls
- Billing N123 in conjunction with N124 (Functional stereotaxy) will result in a rejection or zero-payment, as N123 is considered included in the functional procedure.
- Attempting to claim E896 (micro-electrode recording) when N124 is also billed is invalid, as E896 is strictly an add-on to N123 and is excluded when functional stereotaxy is performed.
- Failing to document the specific use of sophisticated micro-electrode recording in the operative report will lead to audit recovery of the E896 premium.
Billing Tips
- Always verify if the procedure qualifies as functional stereotaxy (N124) before billing N123, as N124 takes precedence and renders N123 non-payable.
- Ensure the required add-on codes E931 or E896 are submitted on the same claim as N123 to ensure the flat-fee premiums are correctly processed.
Effective: April 1, 2026
X. Neurological Surgical Procedures
NEUROLOGICAL SURGICAL PROCEDURES
Surgical
Neurological Surgical Procedures
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