J308 – Carbon dioxide ventilatory response
OHIP Cardio-Thoracic Surgery Code — PULMONARY FUNCTION STUDIES · Schedule of Benefits
J308 is a diagnostic procedure that measures the carbon dioxide ventilatory response. As outlined on page of the Schedule, this service has two separately payable components: * Technical Component (H Fee - $19.90): Covers the use of equipment, supplies, and personnel to perform the test. Per page , the physician claiming this component is responsible for the complete quality assurance process for all elements of the service. * Professional Component (P Fee - $14.60): Covers the physician's work in interpreting the test results and providing a report of their findings.
When to Use
- Use J308 when performing a specialized assessment of central chemoreceptor sensitivity in patients with suspected sleep-disordered breathing or unexplained hypercapnia.
- Select J308 instead of standard spirometry codes like G399 when the clinical objective is specifically to quantify the ventilatory drive response to hypercapnia.
Common Pitfalls
- Claiming the technical component (H308) without maintaining the mandatory quality assurance records for data acquisition and equipment calibration as required by GP11.
- Submitting J308 without a formal referral from a physician, nurse practitioner, or oral maxillofacial surgeon, which leads to automatic rejection.
- Billing J308 in a community office setting when the referral source is a nurse practitioner, as this is only insured in an ICHSC or hospital.
Billing Tips
- Ensure you submit both the technical component (H308) and the professional component (P308) separately if you are providing both the equipment/staff and the final interpretation.
- Verify that the referral source is clearly documented in the patient chart, as the MOH may request proof of the referral to validate the claim.
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 to establish that the service was provided, is the service for which the account is submitted, and was medically necessary.
The physician submitting a claim for the technical component is responsible for the complete quality assurance process for all elements of the technical component of the service, including data acquisition, reporting, and record keeping. The physician must be able to demonstrate this upon request by the MOH.
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