CPT® Code 92520

Laryngeal function studies, as denoted by CPT® Code 92520, encompass a range of diagnostic evaluations aimed at assessing the functionality of the larynx, which is crucial for voice production. These studies primarily include aerodynamic testing and acoustic testing. Aerodynamic testing, often referred to as aerodynamic voice analysis, employs an air transducer to measure the airflow from the lungs as it passes through the vocal folds during vocalization. This process helps to illustrate how effectively air is utilized in voice production. On the other hand, acoustic testing, known as acoustic analysis, utilizes advanced computerized instruments to capture and analyze the acoustic properties of the voice. During this testing, as the patient vocalizes, the instruments assess various voice characteristics such as hoarseness, pitch, and loudness, translating these factors into visual representations on a screen. The results are quantitatively measured and displayed on a digital readout, providing a comprehensive overview of the patient's vocal performance. Additionally, a spectrograph may be employed to create a visual chart of the patient's voice on paper, further aiding in the analysis. Ultimately, all collected voice measures undergo thorough analysis, culminating in a written interpretation of the results, which is essential for diagnosing and managing voice disorders.