M134 – Thoracotomy for post-operative haemorrhage or empyema
OHIP Ophthalmology Code — RESPIRATORY SURGICAL PROCEDURES · Schedule of Benefits
This service is a thoracotomy performed for the treatment of post-operative haemorrhage or empyema. The fee includes pre-operative and post-operative care as outlined in the Surgical Preamble (). The anaesthetic base units are 13, and the assistant base units are 9. Payment for a second surgical assistant is allowed without special authorization ().
When to Use
- Use M134 specifically for a return to the operating room to address post-operative haemorrhage following a primary thoracic procedure.
- Use M134 for the surgical management of a post-operative empyema that requires a formal thoracotomy rather than simple tube thoracostomy or drainage.
Common Pitfalls
- Billing M134 alongside the original primary surgery code is a common error; remember that the 14-day post-operative period for the primary surgery usually includes follow-up, but M134 is a distinct procedure for a complication.
- Failing to document the specific indication (haemorrhage or empyema) in the operative report can lead to audit rejections, as this code is strictly defined for these two complications.
Billing Tips
- Since M134 allows for a second surgical assistant without special authorization, ensure both assistants are billed on the same claim to avoid manual review delays.
- If the procedure is performed after hours, ensure the correct E-code (E409/E410) is linked to the M134 claim to capture the 50% or 75% procedural premium.
Effective: April 1, 2025
P. Respiratory Surgical Procedures
RESPIRATORY SURGICAL PROCEDURES
Surgical
Respiratory Surgical Procedures, Cardiovascular Surgical Procedures
Anaesthetic base units: 13
Assistant base units: 9
Listed under both Respiratory Surgical Procedures () and Cardiovascular Surgical Procedures ().
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