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Z172
Z172 – Abscess or haematoma - General anaesthetic - subcutaneous - two or more
OHIP Psychiatric Code — INTEGUMENTARY SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
An integumentary system surgical procedure for which specific details are not provided in the Schedule of Benefits. As a 'Z' prefix procedure, the fee for this service generally does not include pre-operative or post-operative care, which may be billed separately as per the rules outlined in the General Preamble (, ). The anaesthesia fee is calculated based on 7 base units plus time units. Suffix 'A' is used for the surgeon and 'C' for the anaesthesiologist. Assisting at this surgery (suffix 'B') is not an insured service.
When to Use
- Use Z172 when performing the surgical drainage of two or more distinct subcutaneous abscesses or hematomas requiring general anaesthesia.
- Select Z172 specifically when the procedure is performed in an operating room setting, distinguishing it from minor office-based drainage codes like Z102 or Z105.
Common Pitfalls
- Billing Z172 for a single abscess is a common error; ensure the documentation explicitly confirms the drainage of two or more distinct sites to avoid rejection.
- Failing to append the E515 premium when the procedure is the sole surgical intervention performed in the operating room results in significant lost revenue.
Billing Tips
- Always bill your pre-operative assessment and post-operative follow-up visits separately, as Z-prefix codes do not include these services in the fee.
- Verify that the procedure is performed in a formal operating room, as Z172 is ineligible for the E515 premium if performed in an emergency department or minor procedure room.
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