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Z901
Z901 – Irrigation of nasolacrimal system
OHIP Psychiatric Code — OCULAR SURGICAL PROCEDURES · Schedule of Benefits
Irrigation of nasolacrimal system - per eye
When to Use
- Use Z901 when performing a diagnostic or therapeutic irrigation of the nasolacrimal duct for epiphora or suspected obstruction.
- Use this code for the procedure itself, distinct from a general eye exam or a consultation code like A005.
Common Pitfalls
- Billing Z901 bilaterally without using the appropriate eye modifiers (e.g., LT/RT) will lead to rejection or payment for only one eye.
- Attempting to bill Z901 alongside a general assessment code (A005) often triggers a 'duplicate service' or 'included in assessment' rejection unless the procedure is the primary reason for the visit and documented as such.
- Confusing Z901 with Z902 (probing of nasolacrimal duct); Z901 is strictly for irrigation and carries a lower fee than the more invasive probing procedure.
Billing Tips
- If you perform the procedure on both eyes, bill Z901 twice with the corresponding LT and RT modifiers to ensure the full per-eye fee is captured.
- Ensure the clinical note explicitly states 'irrigation' to distinguish it from 'probing' (Z902) to avoid audit discrepancies regarding the complexity of the service provided.
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