J322 – Standard O2 consumption and CO2 production
OHIP Cardio-Thoracic Surgery Code — PULMONARY FUNCTION STUDIES · Schedule of Benefits
J322 is a pulmonary function study for the measurement of standard oxygen (O₂) consumption and carbon dioxide (CO₂) production. The service has two components: - H: Technical component, payable at $5.30. - P: Professional component, payable at $6.45. (Source: :).
When to Use
- Use J322 when performing indirect calorimetry to assess metabolic rate in patients with complex nutritional or respiratory failure requirements.
- Select J322 for specialized physiological assessment of gas exchange efficiency that exceeds the scope of standard spirometry codes like J301 or J304.
Common Pitfalls
- Billing the technical component (H) for services performed within a hospital setting will result in automatic rejection due to global hospital funding rules.
- Submitting J322 alongside comprehensive pulmonary function panels (e.g., J315, J316) without clear clinical justification for the distinct metabolic measurement can trigger audit flags for unbundling.
- Failing to maintain specific quality assurance logs for the technical component renders the H fee ineligible for payment during a Ministry audit.
Billing Tips
- Ensure you append the correct suffix (H or P) to the code; billing the professional component (P) alone is appropriate when the equipment is hospital-owned, while the H component is only for physician-owned equipment in non-hospital settings.
Effective: April 1, 2025
H. Pulmonary Function Studies
PULMONARY FUNCTION STUDIES
Diagnostic
Pulmonary Function Studies
All insured services must be documented in appropriate records to establish that an insured service was provided, the service claimed is the service that was rendered, and the service was medically necessary. (Source: :).
For the technical component, the physician must maintain documentation that describes the process by which the physician monitors quality assurance in accordance with professional standards. 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. (Source: :).
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