J340 – Maximum inspiratory and expiratory pressures
OHIP Cardio-Thoracic Surgery Code — PULMONARY FUNCTION STUDIES · Schedule of Benefits
Maximum inspiratory and expiratory pressures is a diagnostic procedure listed in the Pulmonary Function Studies section of the Schedule of Benefits. It has a technical component (H Fee) and a professional component (P Fee) which are claimed separately. As per , the technical component ('H' Fee) is generally only payable when the service is rendered in a hospital.
When to Use
- Use J340B and J340C when assessing respiratory muscle strength in patients with suspected neuromuscular disease or unexplained dyspnea.
- Select this code when performing a focused assessment of diaphragm function that is not captured by standard spirometry (G399) or full pulmonary function testing (G398).
Common Pitfalls
- Billing the technical component (J340B) for tests performed in a private office setting will result in automatic rejection, as it is restricted to hospital facilities.
- Failing to submit both the B and C suffixes separately prevents the full professional and technical reimbursement from being processed.
Billing Tips
- Ensure the professional component (J340C) is billed under the physician's provider number, while the technical component (J340B) must be linked to the facility where the equipment is located.
Effective: April 1, 2025
H. Pulmonary Function Studies
PULMONARY FUNCTION STUDIES
Diagnostic
Pulmonary Function Studies
For those diagnostic services which have both technical and professional components listed under one fee schedule code, the technical and professional components are claimed separately. The claim for the technical component is submitted using the fee schedule code with the suffix B and the claim for the professional component is submitted using the fee schedule code with a suffix C.
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