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Billing code

J324C — Repeat After Bronchodilator T

Spirometry after bronchodilator

Bill J324 for simple spirometry repeated after a bronchodilator, following J301.

Watch for: Not payable the same day as J304 or J327 for the same patient; keep the best of three with a written interpretation.

Code

J324C

Description

Repeat After Bronchodilator T

FHO+ basket

Covered by the FHO+ base rate payment for enrolled patients, and shadow billed at 30% (50% for Schedule 2B procedures).

Effective date

Apr 1, 2026

Termination date

No end date

Explanation

Updated October 26, 2026

Simple spirometry repeated after a bronchodilator: the post-bronchodilator volume-versus-time study that follows J301.

What it covers

Simple spirometry (J301) is a volume-versus-time study that must include vital capacity, FEV1 and FEV1/FVC, and may include MMEFR (FEF25–75). J324 is the repeat study after a bronchodilator (H4).

Pulmonary function tests have a professional component (supervision, interpretation) and a technical component (performing the test, records, a signed written report to the referring provider) (H1–H2).

Billing rules

• Technical (T, suffix B) and professional (P, suffix C) components are claimed separately (H3).
• Unlike most pulmonary function tests, the technical component is payable in the office (H3). In hospital it is paid at 86.10% of the T fee, and never for in-patients or patients admitted to the same hospital within 24 hours for the same condition (GP11).
• J301 and J324 are not payable for the same patient on the same day as J304 or J327 (flow volume loop) (H4).
• The result must be the best of three recorded tests, or the study is not eligible for payment (H4).
• There must be a permanent record with a written interpretation by the physician, or the study is not eligible for payment (H4).
• Can be delegated to trained office staff, even with the physician off site, for your own patient, with chart documentation of who did it (GP62–GP63).
• Not payable for routine pre-operative screening for non-thoracic surgery unless needed for respiratory diagnosis, anaesthetic decision-making or optimizing respiratory disease (H3).
• FHO: J324C is an in-basket (Schedule 2) code (Agreement p.78).

Often billed with

• J301 simple spirometry before the bronchodilator (H4).

Common rejections

• ADH: J324 was billed the same day as J304 or J327 for the same patient; simple spirometry and flow volume loop codes cannot be billed together (H4).

Related codes: J301, J304, J327, J330, E450, J310

Source: Schedule of Benefits (July 1, 2026), Pulmonary Function Studies, Simple spirometry, page H4.

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