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Billing code

J305C — Lung Compliance

Lung compliance study

Bill J305 for a lung compliance study recording the pressure-volume curve from total lung capacity to functional residual capacity.

Watch for: Outside a hospital only the professional component (suffix C) is billable; a technical claim needs the service location indicator.

Code

J305C

Description

Lung Compliance

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

Lung compliance study: a pressure-volume curve of the lung from total lung capacity to functional residual capacity.

What it covers

J305 measures lung compliance by recording the pressure-volume curve of the lung from total lung capacity (TLC) to functional residual capacity (FRC) (H5).

It has a technical (H) and a professional (P) component. The P component covers supervision, any associated clinical procedure, monitoring and interpretation; the H component covers performing the test, records and the signed written report (H1–H2).

Billing rules

• Technical (H) and professional (P) components are claimed separately: suffix B for H, suffix C for P (H3).
• The H component is payable only in a hospital or a hospital's approved off-site premises, and not for in-patients or patients admitted within 24 hours for the same condition (H1, GP11).
• Outside a hospital, only the P component is billable (suffix C); ICHSC technical costs are in the Schedule of Facility Costs (H3).
• The interpretation (element D) must be done personally by the physician claiming the P component; supervision and associated procedures may be delegated to another physician (H1).
• Each coded test is a specific test that must be individually ordered (H3).
• Not payable for routine pre-operative screening for non-thoracic surgery unless needed for respiratory diagnosis, anaesthetic decisions or optimizing the patient's respiratory disease before surgery (H3).

Common rejections

• VHC: OHIP describes this as 'SLI required for technical fee': a technical-component (suffix B) claim needs the service location indicator, and the H fee is only payable in a hospital or approved off-site premises (H1, GP11).

Related codes: J306, J303, J311, J307, J310, J340

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

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