HCPCS 94726

Plethysmography for determination of lung volumes and, when performed, airway resistance

AI EXPLANATION: A pulmonary function test measuring lung volume and airway resistance evaluates how well your lungs perform. During the test, you sit inside a clear, sealed chamber resembling a telephone booth and breathe through a specialized mouthpiece. Sensitive sensors track shifts in air pressure and volume to determine the total amount of air your lungs can hold and how easily air flows through your airways.