R471 – Interphalangeal arthrodesis
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
R471 is for the arthrodesis, or surgical fusion, of one interphalangeal joint of the foot or ankle. This service is categorized under Musculoskeletal System Surgical Procedures. The fee for each additional interphalangeal joint fused during the same operation should be claimed using E575. This procedure is eligible for surgeon (A), assistant (B), and anaesthetist (C) suffixes. The fees for the assistant and anaesthetist are calculated based on a combination of base units and time units.
When to Use
- Use R471 as the primary billing code for the first interphalangeal joint fusion performed on a foot or ankle.
- Use R471 for surgical arthrodesis of a single interphalangeal joint when treating conditions such as severe hammer toe deformity or post-traumatic arthritis.
Common Pitfalls
- Do not bill R471 multiple times for additional joints; use E575 for every subsequent interphalangeal joint fused in the same operative session.
- Avoid billing R471 if the procedure is part of a more comprehensive reconstruction that is better described by a different musculoskeletal code, as this may lead to rejection for duplicate billing.
Billing Tips
- Ensure the primary procedure R471 is listed first on the claim, followed by all E575 units to ensure correct processing of the primary fee and subsequent add-on fees.
- When performing bilateral procedures, remember that the anaesthetist and assistant base units are restricted to the major procedure only per the payment adjustment rules.
Effective: April 1, 2026
N. Musculoskeletal System Surgical Procedures
MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
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