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Z771
Z771 – Aspiration biopsy, thyroid gland or nodule fine needle method
OHIP Psychiatric Code — ENDOCRINE SURGICAL PROCEDURES · Schedule of Benefits
Z771 is for an aspiration biopsy of the thyroid gland or a thyroid nodule using the fine needle method. It is classified as an Endocrine Surgical Procedure under the Thyroid Gland subsection. As a surgical procedure listed in Part Z of the Schedule, it is eligible for age-based fee premiums for patients under 16 years of age as described on . It is also eligible for after-hours procedure premiums (E409, E410) when rendered under non-elective circumstances as per .
When to Use
- Use Z771 for fine needle aspiration (FNA) of a thyroid nodule performed as a standalone diagnostic procedure.
- Use Z771 when the procedure is performed in an office or hospital setting to obtain cytologic samples for pathology review.
Common Pitfalls
- Do not bill Z771 in conjunction with an office visit (A007) unless the visit meets the criteria for a separate, identifiable service unrelated to the biopsy.
- Avoid billing Z771 for core needle biopsies; Z771 is strictly defined for fine needle aspiration methods.
- Z771 is a surgical procedure code; billing it as a consultation or assessment code will result in rejection or audit recovery.
Billing Tips
- Ensure the pathology requisition and clinical notes clearly document the fine needle technique to support the use of Z771 over other surgical biopsy codes.
- If the procedure is performed on a pediatric patient, ensure the age-based premium is applied to the claim to maximize the fee.
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