CPT® Code 31574

The procedure described by CPT® Code 31574 involves a flexible laryngoscopy, which is a minimally invasive technique used to visualize the larynx and vocal cords. This procedure is specifically performed with the intent to inject a therapeutic material into one side (unilateral) of the vocal fold. The primary purpose of this injection is for augmentation, which can address various conditions such as unilateral vocal cord paralysis, vocal cord bowing, or other issues resulting from muscle atrophy, paresis, or age-related changes in the larynx (presbylaryngis). The materials used for injection can vary and may include substances like steroids, botulinum toxin (a chemodenervation agent), gelfoam, collagen, micronized AlloDerm, Teflon, and calcium hydroxyapatite. Before the procedure, a topical anesthetic is applied to the nasal cavity, palate, and posterior pharynx to minimize discomfort. The flexible laryngoscope is then introduced through the nose, allowing for direct visualization of the larynx and vocal cords. Depending on the approach—whether percutaneous or transoral—the injection technique may differ, but all methods aim to deliver the selected material precisely to the vocal fold under endoscopic guidance. This procedure is crucial for patients experiencing voice disorders due to the aforementioned conditions, as it can significantly improve vocal function and quality of life.