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X335
X335 – Induction of hypothyroidism
OHIP Laboratory Code — RADIATION ONCOLOGY · Schedule of Benefits
This service covers the use of non-sealed source radioisotopes for the induction of hypothyroidism. The fee for X335 is comprehensive and includes the necessary treatment planning, dosage calculation, and preparation of the radioisotope materials. It also covers all administrations related to this treatment that occur within a three-month timeframe. Physicians may bill for other appropriate services, such as visits or other procedures, in addition to this code.
When to Use
- Use X335 specifically for the administration of radioiodine (I-131) to induce hypothyroidism in patients with hyperthyroidism or thyroid malignancy.
- Select X335 when the treatment plan requires the physician to oversee the dosage calculation and material preparation for non-sealed source radioisotope therapy.
Common Pitfalls
- Billing X335 more than once within a 90-day window is a common rejection, as the code is defined as a comprehensive fee covering all administrations in that period.
- Failing to recognize that X335 is a procedural code and attempting to bill it as a consultation or assessment will result in claim rejection.
Billing Tips
- Ensure that any associated office visits or unrelated procedural benefits performed during the three-month treatment window are billed separately, as X335 does not bundle these services.
- Verify that the documentation clearly distinguishes the radioisotope administration from other thyroid-related procedures like X326 or X327 to avoid audit flags regarding duplicate service claims.
Provider Fee$80.00
Effective: April 1, 2025
Category
C. Radiation Oncology
Subcategory
RADIATION ONCOLOGY
Service Type
Procedure
Code Classes
Radiation Oncology
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