J334 – J332 with at least two levels of supplemental O2
OHIP Cardio-Thoracic Surgery Code — PULMONARY FUNCTION STUDIES · Schedule of Benefits
This service is an assessment of oxygen saturation by oximetry, performed at rest and with exercise, or during sleep. It is an extension of the service described by J332, additionally requiring the test to be conducted with at least two different levels of supplemental O₂. This service has two components: a technical component (H) and a professional component (P). Claims for the technical component (H) should be submitted using the billing code with a 'B' suffix (J334B), and for the professional component (P) using a 'C' suffix (J334C), as per . For payment eligibility, a permanent record of the study must be maintained (). The technical component is only eligible for payment if the physician has the necessary training and experience and maintains quality assurance documentation ().
When to Use
- Use J334 when you must titrate oxygen flow rates for a patient to determine the specific liter flow required to maintain saturation above 88% during exertion.
- Select J334 over J332 when the clinical protocol requires documenting oxygen saturation at two distinct supplemental oxygen levels (e.g., 2L/min and 4L/min) to assess response.
Common Pitfalls
- Billing J334 in conjunction with any overnight sleep study or codes like J336 will result in an automatic rejection.
- Failing to document the specific oxygen flow rates used for both levels will lead to audit recovery, as the 'two levels' requirement is the primary differentiator from J332.
Billing Tips
- Ensure you bill both the technical component (J334B) and the professional component (J334C) to capture the full value of the study, provided you meet the quality assurance documentation requirements.
Effective: April 1, 2025
H. Pulmonary Function Studies
PULMONARY FUNCTION STUDIES
Diagnostic
Pulmonary Function Studies, Diagnostic and Therapeutic Procedures
A permanent record of the study must be maintained.
For the technical component, the physician must maintain documentation describing the process by which the physician monitors quality assurance in accordance with professional standards.
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