J305 – Lung compliance
OHIP Cardio-Thoracic Surgery Code — PULMONARY FUNCTION STUDIES · Schedule of Benefits
J305 is a diagnostic procedure to measure lung compliance, which is determined by creating a pressure-volume curve of the lung from Total Lung Capacity (TLC) to Functional Residual Capacity (FRC). This service is listed with separate technical (H Fee) and professional (P Fee) components. The technical component is subject to specific payment rules outlined in the of the Schedule of Benefits.
When to Use
- Use J305 when performing a specialized pressure-volume curve assessment to differentiate between restrictive lung diseases, distinguishing it from routine spirometry like J303.
- Select J305 specifically for patients requiring advanced physiological assessment of lung elasticity that exceeds the diagnostic capabilities of standard pulmonary function tests like J306 or J307.
Common Pitfalls
- Billing the technical component (H fee) for J305 when the service is performed within a hospital setting, as this is strictly prohibited under GP11 rules.
- Submitting J305 alongside other pulmonary function codes like J311 or J310 without clear medical necessity for the additional diagnostic depth, which often triggers audit flags for unbundling.
Billing Tips
- Ensure the professional component (P fee) is submitted under your own billing number, maintaining rigorous documentation of the quality assurance process for the technical data acquisition to satisfy MOH audit requirements.
Effective: April 1, 2025
H. Pulmonary Function Studies
PULMONARY FUNCTION STUDIES
Diagnostic
Pulmonary Function Studies, Diagnostic and Therapeutic Procedures
All insured services must be documented in appropriate records. The Act requires that the record establish that: - an insured service was provided; - the service for which the account is submitted is the service that was rendered; and - the service was medically necessary.
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