Z432 – Examination under anaesthesia
OHIP Psychiatric Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
An examination under anaesthesia (EUA), with or without intubation, which may include the removal of a vaginal foreign body. Per , the specific elements for this service are those for a therapeutic procedure. Z432 is only payable if it is the sole procedure performed by the examining physician; if claimed in conjunction with any other procedure, the service is payable at nil. Claims for EUA must include an applicable diagnostic code to be eligible for payment. The anaesthesia service rendered in support of Z432 is payable separately as E023C and not as Z432C.
When to Use
- Use Z432 when performing a stand-alone examination under anaesthesia to investigate a clinical concern, such as a suspected vaginal foreign body, where no other surgical or therapeutic intervention is performed.
- Use this code when the clinical objective is strictly diagnostic (e.g., assessing pelvic pathology) provided that the examination is the only procedure billed by you for that encounter.
Common Pitfalls
- Billing Z432 alongside any other procedural code will result in the Z432 claim being paid at nil, as it is strictly restricted to being the sole procedure performed.
- Using the standard anaesthesia code Z432C is a common error; you must use E023C for the anaesthesia service, or the claim will be rejected or paid incorrectly.
- Omitting a specific diagnostic code on the claim will lead to an automatic rejection or payment at nil, as the Schedule of Benefits requires a valid diagnosis for this specific procedure.
Billing Tips
- Ensure your billing software is configured to link E023C for the anaesthesiologist's service, as Z432 is explicitly excluded from the standard anaesthesia billing rules found in GP94.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Procedure
Diagnostic and Therapeutic Procedures
Claims for EUA submitted without the applicable diagnostic code are payable at nil.
Examination under anaesthesia (EUA) (when sole procedure performed)
While this may be performed for diagnostic purposes, the specific elements are those for a therapeutic procedure.
EUA is payable only if sole procedure performed by examining physician. EUA claimed in conjunction with any other procedure is payable at nil.
Claims for EUA submitted without the applicable diagnostic code are payable at nil.
Despite paragraph b. listed under Basic Units on , no anaesthesia service other than E023C is eligible for payment when rendered in support of Z432.
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