G913 – Percutaneous diagnostic injections - each additional site
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
This is an add-on code for percutaneous diagnostic vertebral facet injections. It applies to each additional site when performed with fluoroscopic guidance, such as a facet medial branch block, facet joint injection, or sacral lateral branch block. This code must be claimed in addition to the primary injection codes G910, G911, or G912.
When to Use
- Use G913 when performing diagnostic facet joint injections or medial branch blocks at multiple levels during the same session, with the first level billed under G910, G911, or G912.
- Apply G913 for each subsequent vertebral level treated beyond the primary site to account for the additional procedural work and fluoroscopic guidance required.
Common Pitfalls
- Billing G913 as a standalone service without a corresponding primary code (G910, G911, or G912) will result in an automatic rejection.
- Exceeding the 6-service annual limit for the primary codes without prior MOH authorization will cause the associated G913 claims to be rejected or flagged for audit.
Billing Tips
- Ensure the number of units for G913 accurately reflects the total number of additional sites injected beyond the primary level to maximize reimbursement for multi-level procedures.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Procedure
Diagnostic and Therapeutic Procedures
The primary codes this service is added to (G910, G911, G912) are each limited to 6 services per patient per 12 month period. If, in the opinion of the treating physician, more frequent services are necessary, the physician may obtain written prior authorization from the MOH. Authorization will be dependent on the physician demonstrating that the increased frequency of the service is generally accepted as necessary for the patient under the circumstances.
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