All codes
Z818
Z818 – Subsequent aspiration through existing burr hole within 30 days
OHIP Psychiatric Code — NEUROLOGICAL SURGICAL PROCEDURES · Schedule of Benefits
This service covers a subsequent aspiration performed through an existing burr hole, typically following a procedure like N115 (aspiration) for an intracranial abscess. It is a surgical procedure that does not include fees for an assistant or anaesthetist. The primary condition for payment is that the service must be rendered within 30 days of the initial procedure that established the burr hole.
When to Use
- Use for a repeat aspiration of an intracranial abscess or hematoma through a previously established burr hole within 30 days of the initial N115 procedure.
- Use when performing a follow-up drainage of a post-operative collection that requires re-entry through the exact same burr hole site used in the primary surgery.
Common Pitfalls
- Billing Z818 beyond the 30-day window from the initial procedure will result in a rejection; ensure the date of service falls strictly within this timeframe.
- Attempting to bill an assistant fee or anaesthetist fee with this code will lead to automatic rejection, as the code is defined as a standalone surgical fee.
- Confusing Z818 with N115; N115 is for the initial aspiration, whereas Z818 is specifically for the subsequent aspiration through the existing site.
Billing Tips
- If the procedure is performed after hours, ensure you apply the appropriate after-hours premium (E409 or E410) to the base fee of $215.35 to maximize the claim value.
Ready to bill this code?
SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.