Z812 – Subsequent revisions or replacements within 30 days
OHIP Psychiatric Code — NEUROLOGICAL SURGICAL PROCEDURES · Schedule of Benefits
This service covers the subsequent revision or replacement of an intracranial pressure monitor and/or external ventricular drainage. It is payable for each revision or replacement that occurs within 30 days following the initial procedure, which is billed under Z820. This is a surgical procedure billable by the surgeon ('A' suffix), and services for an assistant ('B' suffix) and anaesthetist ('C' suffix) are also eligible for payment.
When to Use
- Use Z812 when an intracranial pressure monitor or external ventricular drain requires revision or replacement within 30 days of the initial Z820 procedure.
- Apply this code for secondary surgical interventions necessitated by malfunction, displacement, or clinical requirement for a new device placement following the index Z820 procedure.
Common Pitfalls
- Billing Z812 for procedures occurring after the 30-day window from the initial Z820; these must be billed as new procedures rather than revisions.
- Failing to link the Z812 service to the original Z820 date, which can lead to audit flags regarding the necessity of the revision.
- Attempting to bill Z812 as an add-on to other non-related neurological procedures; it is strictly tied to the Z820 pathway.
Billing Tips
- Ensure the operative report clearly justifies the revision or replacement to satisfy the documentation requirements for medical necessity.
- Apply the appropriate age-based premiums (e.g., AGE_PREMIUM_LT30D) to Z812 if the patient meets the age criteria, as these are explicitly eligible for this surgical code.
Effective: April 1, 2025
X. Neurological Surgical Procedures
NEUROLOGICAL SURGICAL PROCEDURES
Surgical
Neurological Surgical Procedures
All insured services must be documented in appropriate medical records, establishing that the service was provided, is the service for which the account is submitted, and was medically necessary.
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