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Z851
Z851 – Therapeutic paracentesis
OHIP Psychiatric Code — OCULAR SURGICAL PROCEDURES · Schedule of Benefits
When to Use
- Use Z851 for a therapeutic corneal paracentesis performed to reduce intraocular pressure in acute angle-closure glaucoma.
- Use Z851 when performing a diagnostic or therapeutic tap of the anterior chamber to obtain aqueous humor or relieve pressure, provided no other restricted surgical codes are billed.
Common Pitfalls
- Billing Z851 on the same day as E175, Z844, E186, E187, or E149 will result in an automatic rejection due to the explicit billing restrictions.
- Attempting to bill a consultation or office visit code on the same day as Z851 often triggers audit flags; ensure the visit is distinct and medically necessary if billing both.
Billing Tips
- If the procedure is performed on a patient under 16, ensure the age-based premium is applied to the Z851 fee to maximize the claim value.
- When anaesthesia is required, ensure the 6 base units are clearly documented alongside the time units to support the anaesthesiologist's claim.
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