R242 – Bone - incision and drainage
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
A surgical procedure for the incision and drainage of the femur bone. The surgeon's fee (R242A) is a flat rate. When an assistant is required, the service is billed as R242B, with the fee calculated based on 6 base units plus time units. When anaesthesia is administered, the service is billed as R242C, with the fee calculated based on 7 base units plus time units. Various premiums for age, trauma, and after-hours services may also apply.
When to Use
- Use R242A for the primary surgeon when performing an incision and drainage of the femur bone.
- Use R242B when a surgical assistant is required, ensuring the claim includes the calculated base units plus time units.
- Use R242C when an anaesthesiologist is present, applying the 7 base units plus the appropriate time unit calculation.
Common Pitfalls
- Failing to document the Injury Severity Score (ISS) in the medical record when claiming the E420 trauma premium.
- Attempting to stack E420 with after-hours premiums (E409, E410, E400B, E401B, E400C, E401C), as these are mutually exclusive.
- Incorrectly calculating assistant or anaesthesiologist time units by failing to apply the tiered unit values for intervals exceeding one hour.
Billing Tips
- When performing multiple or bilateral procedures under the same anaesthetic, ensure the base units for the assistant and anaesthesiologist are derived solely from the major procedure.
- For R242B and R242C, always verify that the time units are calculated in 15-minute increments or parts thereof, adhering to the specific unit multipliers for the first hour versus subsequent time.
Effective: April 1, 2026
N. Musculoskeletal System Surgical Procedures
MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
Standard medical record requirements apply as per .
For the Trauma Premium (E420), the medical record must list the Injury Severity Score (ISS).
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