J330 – Assessment of exercise induced asthma
OHIP Cardio-Thoracic Surgery Code — PULMONARY FUNCTION STUDIES · Schedule of Benefits
Assessment of exercise-induced asthma is a pulmonary function study comprised of a technical component (H Fee) and a professional component (P Fee). The service requires a workload sufficient to achieve a heart rate of 85% of the patient's predicted maximum, with performance of either a simple spirometry (J301) or a flow volume loop (J304) before exercise and again 5-10 minutes post-exercise.
When to Use
- Use J330 when a patient presents with exertional dyspnea or wheezing and you need to confirm exercise-induced bronchoconstriction via standardized pre- and post-exercise spirometry.
- Select J330 instead of a standalone J301 or J304 when the primary diagnostic intent is to assess the pulmonary response to a specific workload challenge.
Common Pitfalls
- Billing J301 or J304 on the same day as J330 will trigger an automatic rejection because the spirometry component is already bundled into the J330 fee.
- Failure to document the patient's heart rate reaching 85% of their predicted maximum is a common audit trigger that leads to full claim recovery.
Billing Tips
- Ensure you submit the technical component as J330B and the professional interpretation component as J330C to receive the full payment for the service.
Effective: April 1, 2025
H. Pulmonary Function Studies
PULMONARY FUNCTION STUDIES
Diagnostic
Pulmonary Function Studies
The medical record must document the performance of J301 or J304 before and after exercise.
The workload must be sufficient to achieve a heart rate of 85% of the predicted maximum, and this should be documented.
The time of the post-exercise spirometry (5-10 minutes) should be noted.
Ready to bill this code?
SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.