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Billing code

J306C — Airways Resistance By Plethysmography Or Estimated Using

Airways resistance study

Bill J306 for airways resistance measured by plethysmography or estimated with an oesophageal catheter.

Watch for: Outside a hospital only the professional component (suffix C) is billable; not payable for routine pre-operative screening before non-thoracic surgery.

Code

J306C

Description

Airways Resistance By Plethysmography Or Estimated Using

FHO+ basket

Not in the FHO+ base rate basket (Schedule 2 or 2B).

Effective date

Apr 1, 2026

Termination date

No end date

Explanation

Updated October 26, 2026

Airways resistance measured by plethysmography or estimated with an oesophageal catheter, with technical and professional components.

What it covers

J306 is airways resistance by plethysmography or estimated using an oesophageal catheter (H5).

Extra-pulmonary airways resistance by plethysmography is a separate code, J303 (H5).

Billing rules

• Technical component (H, suffix B) is paid only at a hospital or a hospital's approved off-site premises; outside hospital only the professional component (P, suffix C) is billable (H1, H3).
• Each test with its own code is specific and must be ordered individually (H3).
• The interpretation must be done personally by the physician who claims the professional component; supervision and monitoring may be delegated to another physician (H1).
• Not payable for routine pre-operative screening before non-thoracic surgery, unless needed for respiratory diagnosis, anaesthetic decisions or optimizing respiratory disease before surgery (H3).

Often billed with

• J307 FRC by body plethysmography, ordered individually (H3, H5).

Related codes: J303, J307, J305, J310

Source: Schedule of Benefits (July 1, 2026), Pulmonary Function Studies, Pulmonary Function Studies, page H5. Preamble H1–H3.

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