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L837
L837 – Immunohistochemistry, direct immunofluorescence, in situ hybridization, immunobead or other method and interpretation - per marker
OHIP Dermatology Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
L837 is a special procedure and interpretation service within the Laboratory Medicine section of the Schedule of Benefits. It covers the performance and interpretation of immunohistochemistry on a per-marker basis for histology or cytology specimens.
When to Use
- Use L837 when billing for the technical performance and professional interpretation of a specific immunohistochemical marker, such as Ki-67 or HER2, on a tissue specimen.
- Apply this code per marker when a panel of stains is required to differentiate between tumor types, provided each marker is medically necessary and documented.
Common Pitfalls
- Billing L837 in conjunction with L836 for the same marker is a common error; ensure you are not double-billing the technical and professional components if the global fee is intended.
- Submitting L837 without clear documentation of the specific marker used will trigger a rejection, as the Ministry requires the marker identity to justify the per-unit fee.
Billing Tips
- Ensure the total number of L837 units billed matches the number of distinct markers performed and interpreted, as this is a frequent target for post-payment audit reviews.
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