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Z594
Z594 – Percutaneous abdominal abscess drainage
OHIP Psychiatric Code — DIGESTIVE SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
When to Use
- Use Z594 for the primary percutaneous drainage of one or more abscesses located within a single abdominal quadrant or the pelvis.
- Use Z594 in conjunction with E686 when you perform drainage on additional abscesses located in different abdominal quadrants or the pelvis.
Common Pitfalls
- Do not bill Z594 for simple catheter replacement; use Z595 for that specific service.
- Avoid billing E686 for a pelvic abscess if the primary abscess drained under Z594 was already located in the pelvis.
- Ensure the procedure is non-elective when applying after-hours premiums E409 or E410, as these are not payable for elective drainage.
Billing Tips
- When draining multiple abscesses in separate quadrants, bill Z594 as the primary procedure and add E686 for each additional qualifying quadrant to maximize the claim value.
- If the patient is under 16 years of age, ensure the appropriate age-based percentage premium is applied to the Z594 fee, as this is a surgical procedure.
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