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X324
X324 – Interstitial application of radium or sealed radioisotope
OHIP Laboratory Code — RADIATION ONCOLOGY · Schedule of Benefits
Interstitial application of radium or sealed radioisotope. This service is classified under Radium and Radioisotopes (Sealed Sources). As with all insured services, this includes common elements such as being available for follow-up, making arrangements for appointments, travel, obtaining and reviewing patient information, obtaining consent, maintaining medical records, providing prescriptions, preparing OHIP documents, conferring with other professionals, and the provision of premises, equipment, and personnel, unless otherwise specified (, ).
When to Use
- Use X324 for the active interstitial implantation of sealed radioisotopes (brachytherapy) into a tumor site, distinct from external beam planning or simple surface applications.
- Select X324 when performing the physical placement of radioactive sources, whereas X322 or X323 should be used for different modalities or specific isotope delivery methods as defined in the Schedule of Benefits.
Common Pitfalls
- Billing X324 alongside a consultation or assessment code on the same day is a common audit trigger; ensure the service is distinct and not part of the global procedural fee.
- Failing to document the specific isotope and activity level can lead to claims being flagged, as the Ministry may require verification of the sealed source used for the procedure.
Billing Tips
- If a surgical assistant is required, you must submit the claim with M400B and include a letter of medical necessity to the Ministry, as X324 does not have a pre-assigned assistant suffix.
- Ensure that anesthesia time units are calculated appropriately using the suffix C, as X324 lacks basic units for anesthesia in the Schedule of Benefits.
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