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E588
E588 – Mandibular osteotomies for retrognathia - for apertognathia or laterognathia
OHIP Surgical Assists Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
When to Use
- Use E588 when performing a mandibular osteotomy for retrognathia (R520, R529, or R535) that specifically requires additional surgical maneuvers to correct concurrent apertognathia (open bite).
- Use E588 when the primary mandibular osteotomy procedure is extended to address laterognathia (asymmetry or lateral deviation) in addition to the underlying retrognathia.
Common Pitfalls
- Billing E588 as a standalone procedure; it is strictly an add-on code and will be rejected if not submitted on the same claim as R520, R529, or R535.
- Attempting to bill E588 for standard mandibular advancement without documented correction of apertognathia or laterognathia, which will be flagged during an audit as an inappropriate upcoding of a basic osteotomy.
Billing Tips
- Ensure the operative report explicitly describes the additional surgical steps taken to correct the apertognathia or laterognathia, as this documentation is required to justify the add-on fee during a post-payment review.
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