Billing code
Z594A — Peritoneal Abscess - Percutaneous Abdominal Abscess Drainage Including Daily Supervision, For One Or More Abscesses Within The Same Abdominal Quadrant Or The Pelvis
Abdominal abscess drainage
Bill for percutaneous drainage of one or more abscesses in the same abdominal quadrant or the pelvis, including daily supervision.
Watch for: Add E686 for each other quadrant drained; not payable with appendectomy S207.
| Provider | Specialist | Assistant | Anaesthetist | Non-anaesthetist |
|---|---|---|---|---|
| $508.80 | $0.00 | $0.00 | $0.00 | $0.00 |
- Code
- Z594A
- Description
- Peritoneal Abscess - Percutaneous Abdominal Abscess Drainage Including Daily Supervision, For One Or More Abscesses Within The Same Abdominal Quadrant Or The Pelvis
- FHO+ basket
- Not in the FHO+ base rate basket (Schedule 2 or 2B).
- Effective date
- Apr 1, 2026
- Termination date
- No end date
Explanation
Updated October 26, 2026
Percutaneous drainage of one or more abdominal abscesses in the same quadrant or the pelvis, including daily supervision.
What it covers
Z594 is percutaneous abdominal abscess drainage, including daily supervision, for one or more abscesses within the same abdominal quadrant or the pelvis (S35).
Each other quadrant drained, or the pelvis if the first abscess was not pelvic, is added with E686; replacing the drainage catheter is Z595 (S35).
Billing rules
- Includes daily supervision of the drain (S35).
- Add E686 for each other abdominal quadrant, or the pelvis if the initial abscess was not in the pelvis (S35).
- Not payable with S207 appendectomy (S23).
- A radiologist's consultation (A335) before Z594 can be payable when it meets the consultation rules, is done away from the radiologist's procedural suite and is not just for consent (A192).
- As a Z-code (independent operative procedure), if the major pre-operative visit was in the previous 12 months, only a minor assessment (GP) or partial assessment (specialist) is payable before the procedure that day (SP4).
- Marked #: premises, equipment, supplies and staff for the procedure are not included in the fee (SP1).
Often billed with
- E686 for each additional quadrant or the pelvis (S35).
Related codes: E686, Z595, S314, S313, Z569
Source: Schedule of Benefits (July 1, 2026), Digestive System Surgical Procedures, Abdomen, Peritoneum and Omentum, page S35.
APEX checks every paid claim against the Schedule of Benefits and flags codes billed below what the visit qualified for. See how APEX works · Pricing