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Z740
Z740 – Drainage of intramammary abscess or haematoma - Single or multiloculated - general anaesthetic
OHIP Psychiatric Code — INTEGUMENTARY SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Z740 is for the drainage of a single or multiloculated intramammary abscess or haematoma. This procedure is performed under general anaesthetic, distinguishing it from Z140 which is performed under local anaesthetic. The service includes the surgical procedure itself, and when billed with suffix C, the anaesthesia service with 6 base units.
When to Use
- Use Z740 when performing a formal incision and drainage of an intramammary abscess or hematoma specifically under general anaesthetic.
- Choose Z740 over Z140 when the patient's clinical status or the complexity of the abscess requires general anaesthesia rather than local infiltration.
Common Pitfalls
- Billing Z740 when the procedure was performed under local anaesthetic, which is strictly reserved for Z140 and will trigger a rejection or audit recovery.
- Attempting to bill an assistant fee (M400B) without prior authorization, as this code requires a specific letter of justification to the medical consultant for payment.
Billing Tips
- Ensure the anaesthetic type is clearly documented in the operative note to justify the use of Z740 over the lower-valued Z140.
- If the procedure occurs after hours, ensure you apply the appropriate E-series premium (E409 or E410) to the procedural fee to maximize the claim value.
Provider Fee$133.80
Anaesthetist Fee$92.94
Non-Anaesthetist Fee$92.94
Effective: April 1, 2025
Category
M. Integumentary System Surgical Procedures
Subcategory
INTEGUMENTARY SYSTEM SURGICAL PROCEDURES
Service Type
Surgical
Code Classes
Integumentary System Surgical Procedures
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