R618 – Coronoidotomy
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Coronoidotomy (R618) is a surgical procedure listed in the Musculoskeletal System section of the Schedule of Benefits under Orthognathic Surgery. This procedure involves a surgical incision into the coronoid process of the mandible. It is eligible for surgeon (A), assistant (B), and anaesthetist (C) fees. When multiple or bilateral surgical procedures are performed, billing for assistant and anaesthesia services is based on the major procedure as per guidelines on pages and .
When to Use
- Use R618 when performing a surgical release of the coronoid process to address trismus or restricted mandibular opening.
- Use R618 as the primary procedure code when the coronoidotomy is the definitive surgical intervention for coronoid hyperplasia.
Common Pitfalls
- Billing R618 bilaterally without using the appropriate bilateral indicator or modifier, which may lead to automatic rejection or manual review.
- Attempting to bill R618 in addition to other major orthognathic procedures (e.g., osteotomies) without acknowledging the 'major procedure' rule for assistant and anaesthesia units, which can trigger audit flags.
Billing Tips
- When performing bilateral coronoidotomies, ensure the claim reflects the total units or modifiers required by the Schedule of Benefits for multiple procedures to avoid underpayment.
- Always verify if the procedure is part of a larger orthognathic reconstruction; if so, ensure the assistant and anaesthesia units are calculated based on the single most complex procedure code in the operative session.
Effective: April 1, 2025
N. Musculoskeletal System Surgical Procedures
MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
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