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E477
E477 – Arthroscopy of subtalar and/or intratarsal joint(s)
OHIP Surgical Assists Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Arthroscopy of subtalar and/or intratarsal joint(s), through separate portals, to R688
When to Use
- Use E477 when performing a diagnostic or therapeutic arthroscopic procedure on the subtalar or intratarsal joints specifically in conjunction with an ankle arthroscopy billed under R688.
- Apply this code when the clinical documentation confirms that separate portals were established specifically to access the subtalar or intratarsal space, distinct from the portals used for the primary ankle procedure.
Common Pitfalls
- Billing E477 as a standalone procedure will result in automatic rejection, as it is strictly an add-on code that requires the presence of R688 on the same claim.
- Attempting to bill E477 alongside other foot and ankle arthroscopy codes where the subtalar work is considered an inherent component of the primary procedure will trigger a rejection based on the Schedule's bundling rules.
- Failure to document the specific anatomical location and the use of separate portals for the subtalar/intratarsal work often leads to audit recovery if the claim is flagged for review.
Billing Tips
- Ensure the primary procedure R688 is billed as the main service, with E477 appended to the same claim to ensure the Ministry recognizes the secondary site access.
- Verify that the operative report explicitly details the separate portal placement for the subtalar/intratarsal joint to justify the add-on fee in the event of an audit.
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