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J301
J301 – Volume versus Time Study (Simple Spirometry)
OHIP Cardio-Thoracic Surgery Code · Schedule of Benefits
Volume versus Time Study - must include Vital capacity, , /FVC, and may include calculation of MMEFR(-75).
When to Use
- Use J301 for basic obstructive or restrictive lung disease screening when a simple volume-time tracing is sufficient to obtain FEV1 and FVC values.
- Use J301 when performing pre-bronchodilator baseline testing, with J324 added if a post-bronchodilator assessment is clinically indicated.
Common Pitfalls
- Billing J301 and J304 on the same day will result in an automatic rejection; choose the code that best reflects the complexity of the equipment and data captured.
- Relying solely on the automated computer printout for interpretation is a common audit failure; the physician must provide a signed, independent written interpretation to satisfy the requirement.
- Failing to document that the reported values represent the best of three acceptable maneuvers will lead to a clawback during a post-payment audit.
Billing Tips
- Always append J324 to J301 when performing post-bronchodilator testing to ensure both the baseline and the response are captured for payment.
- Ensure your billing software or manual submission correctly identifies the technical component (GP63) when performed in an office setting to avoid incorrect fee adjustments.
Provider Fee$0.00
Surgical Assistant Fee$10.85
Anaesthetist Fee$7.85
Non-Anaesthetist Fee$7.85
Effective: April 1, 2026
Service Type
Pulmonary Function Studies
Code Classes
Diagnostic
The study must represent the best of three recorded test results.
Must include Vital capacity, , and /FVC.
A permanent record including a written interpretation by the physician is mandatory.
Computer-generated or automated interpretation does not satisfy payment eligibility.
The physician maintains documentation that describes the process by which the physician monitors quality assurance in accordance with professional standards.
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