J320A-a oxygen gradient requiring measurement of RQ by sampling mixed expired gas and using alveolar air equation
PULMONARY FUNCTION STUDIES · OTHER TERMS AND DEFINITIONS
No listed feeWhat this reference tells you
J320 identifies the Ontario insured service described as “A-a oxygen gradient requiring measurement of RQ by sampling mixed expired gas and using alveolar air equation.” The listed fee and rules are reference data; the clinical record must support the service actually performed.
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Confirm the current Ministry publication, the patient and provider context, the date of service, and documentation supporting the claim. A searchable reference does not establish eligibility or guarantee payment.