All codes
L835
L835 – Histochemistry of Muscle - Each Additional Enzyme
OHIP Dermatology Code — Laboratory Medicine · Schedule of Benefits
This service covers the special procedure and interpretation for each additional enzyme in the histochemistry of a muscle specimen. It is billed in addition to L834 (Histochemistry of muscle - 1 to 3 enzymes) for any enzymes beyond the first three.
When to Use
- Use L835 for the fourth, fifth, and subsequent enzyme histochemical stains performed on a muscle biopsy specimen after the initial three are covered by L834.
- Apply this code when a complex diagnostic workup requires a broader panel of metabolic enzymes, such as specific mitochondrial or glycogen storage disease markers, beyond the standard L834 baseline.
Common Pitfalls
- Billing L835 without a corresponding L834 on the same claim will result in an automatic rejection as it is a strictly dependent add-on code.
- Claiming L835 for the first three enzymes is a billing error, as these are already bundled into the L834 fee.
- Failing to document the specific number of additional enzymes performed can lead to audit discrepancies if the claim quantity does not match the laboratory report.
Billing Tips
- Ensure the quantity field in your billing software reflects the exact number of additional enzymes performed beyond the first three covered by L834.
- Verify that the laboratory requisition clearly lists every enzyme performed to support the total quantity of L835 units claimed.
Provider Fee$15.60
Specialist Fee$0.00
Surgical Assistant Fee$0.00
Anaesthetist Fee$0.00
Non-Anaesthetist Fee$0.00
Effective: April 1, 2025
Since Apr 2004, this fee has increased 96.2% vs 57.0% CPI inflation
Category
Diagnostic and Therapeutic Procedures
Subcategory
Laboratory Medicine
Service Type
Laboratory
Code Classes
Diagnostic and Therapeutic Procedures
Referral RequiredFrom: Physician, NursePractitioner
Ready to bill this code?
SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.