CPT® Code 94728

Airway resistance by oscillometry, designated by CPT® Code 94728, is a diagnostic procedure utilized to assess airway obstruction in patients. This method is particularly effective in distinguishing between central and peripheral airway obstructions, which is crucial for accurate diagnosis and treatment planning. The procedure employs oscillometry, a technique that utilizes sound waves to monitor and evaluate changes in the airway. It is commonly applied in patients suffering from asthma and other obstructive pulmonary diseases, where understanding the nature of airway resistance is essential for effective management. During the test, clips are affixed to the patient's nose to ensure that air does not enter through the nostrils, thereby allowing for a controlled assessment of airflow through the mouth. The patient is instructed to breathe normally into a mouthpiece connected to a pneumotachograph, which measures airflow. Concurrently, a sound wave generated by a loudspeaker is introduced, and the interaction between the airflow and the sound wave is captured by the oscillometry device. This device records various components of airway obstruction, providing valuable data for the physician. Following the procedure, the physician analyzes the results and compiles a comprehensive written report detailing the findings, which aids in the subsequent clinical decision-making process.