Z524 – Drainage of haematoma or deep neck abscess (external approach)
OHIP Psychiatric Code — DIGESTIVE SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Drainage of haematoma or deep neck abscess (external approach). This procedure is listed in the Digestive System Surgical Procedures section of the Schedule of Benefits. The '#' prefix indicates that for services performed in a hospital, the facility costs (premises, equipment, supplies, personnel) are funded by the hospital's global budget. For services in an Integrated Community Health Services Centre (ICHSC), these costs are funded by the ICHSC. See for details.
When to Use
- Use Z524 for the surgical incision and drainage of a deep neck abscess or haematoma via an external cervical approach.
- Select Z524 when the procedure is performed in an operating room setting, as the '#' prefix indicates hospital facility costs are globally funded.
Common Pitfalls
- Do not bill Z524 for intraoral drainage of a peritonsillar abscess, as this is typically covered under different codes; Z524 is strictly for the external approach.
- Avoid billing a standard hospital admission assessment on the same day as the surgery, as it is considered included in the surgical fee unless it qualifies as the 'major pre-operative visit' for scheduling.
Billing Tips
- Ensure the operative report explicitly details the external incision and the depth of the dissection to support the use of Z524 over minor procedure codes.
- If the procedure is non-elective and performed after hours, append the appropriate E409A or E410A premium to the Z524 fee to maximize the claim.
Effective: April 1, 2025
S. Digestive System Surgical Procedures
DIGESTIVE SYSTEM SURGICAL PROCEDURES
Surgical
Digestive System Surgical Procedures
Note: To include nasopharynx, oropharynx, hypopharynx except where otherwise specified.
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