Pulmonary function testing may be scheduled as a single diagnostic service, but the billing process can involve several separate procedures. Spirometry, bronchodilator response testing, lung-volume measurement and diffusion-capacity testing each assess a different aspect of respiratory function. Accurate coding therefore depends on identifying the specific test performed and confirming that...
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Pulmonary Function Test CPT Codes for 2026
Pulmonary function testing may be scheduled as a single diagnostic service, but the billing process can involve several separate procedures. Spirometry, bronchodilator response testing, lung-volume measurement and diffusion-capacity testing each





















































