G303 – Transthoracic pacemaker - insertion
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
Insertion of a transthoracic pacemaker. As a service listed under the CRITICAL CARE section of the Schedule of Benefits (see ), it is subject to the medical record requirement that start and stop times of the service must be recorded in the patient's permanent medical record.
When to Use
- Use G303 for the emergency insertion of a temporary transthoracic pacing wire in a patient with symptomatic bradycardia or heart block when transvenous access is not immediately feasible.
- Use this code for the procedure itself, distinct from the subsequent management of the pacemaker, which should be billed using appropriate critical care or subsequent visit codes.
Common Pitfalls
- Failure to document exact start and stop times in the patient chart will result in a mandatory rejection, as this is a strict requirement for critical care section procedures.
- Billing G303 in addition to G211 (insertion of transvenous pacemaker) is inappropriate; choose the code that reflects the actual procedure performed based on the anatomical approach.
Billing Tips
- Ensure that the time recorded in the chart reflects the duration of the procedure itself, as this is a procedural fee rather than a time-based critical care management code.
- Always append the appropriate After Hours Procedure Premium (E409, E410, E412, or E413) if the procedure is performed outside of standard hours to maximize the procedural fee.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Procedure
Diagnostic and Therapeutic Procedures
The service is eligible for payment only if start and stop times of the service are recorded in the patient's permanent medical record.
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