Z541 – Dilation and/or disimpaction or removal of foreign body under general anaesthetic
OHIP Psychiatric Code — DIGESTIVE SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
This service involves the dilation of the rectum and/or the disimpaction of feces or removal of a foreign body. It must be performed under general anaesthesia. The fee for this service applies only when it is performed as the sole procedure during an operative session. The anaesthesia service (Z541C) includes 6 base units, with time units calculated separately based on duration, as detailed on .
When to Use
- Use Z541 for the manual disimpaction of severe fecal impaction that cannot be managed in the office and requires general anaesthesia.
- Use Z541 for the removal of a foreign body from the rectum when the procedure is performed as the sole operative intervention.
Common Pitfalls
- Billing Z541 in conjunction with other rectal surgical procedures will result in a rejection, as Z541 is strictly defined as a sole procedure.
- Attempting to bill for a surgical assistant is a common error, as assistance at surgery is explicitly ineligible for payment for this code.
Billing Tips
- Ensure the anaesthesia claim (Z541C) is submitted with the correct base units (6) and appropriate time units, as the surgeon's fee is a flat fee and not unit-based.
- If the procedure is performed after hours or on a weekend, ensure the appropriate premium (e.g., E409 or E410) is applied to the surgeon's fee to maximize the claim value.
Effective: April 1, 2026
S. Digestive System Surgical Procedures
DIGESTIVE SYSTEM SURGICAL PROCEDURES
Surgical
Digestive System Surgical Procedures
The service must be documented in appropriate records, establishing that the service was provided, is the service submitted for, and was medically necessary.
As this procedure requires a general anaesthetic, standard operative and anaesthetic records must be maintained.
The anaesthesia service for this procedure (Z541C) has 6 base units. Time units are calculated separately as per the rules on .
The fee for the surgeon is for the procedure itself and is not unit-based.
Assistance at surgery is not eligible for payment for this service as per .
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