CPT® Code 91013

Add-On Code

Esophageal motility (manometric study of the esophagus and/or gastroesophageal junction) study with interpretation and report; with stimulation or perfusion (eg, stimulant, acid or alkali perfusion) (List separately in addition to code for primary procedure)

The CPT® Code 91013 refers to an esophageal motility study, which is a diagnostic procedure designed to assess the function of the esophagus and the gastroesophageal junction. This study is particularly useful in evaluating patients who experience swallowing difficulties or non-cardiac chest pain. The primary focus of the esophageal motility study is to measure the muscle contractions within the esophagus, which can provide critical insights into various esophageal disorders. One of the most common conditions diagnosed through this procedure is esophageal achalasia, a disorder characterized by the inability of the lower esophageal sphincter to relax properly, leading to uncoordinated contractions of the thoracic esophagus. This results in a functional obstruction of the esophagus, making it difficult for food and liquids to pass into the stomach. During the procedure, a catheter equipped with a manometer is inserted through the nostril and advanced into the esophagus, allowing for the measurement of pressure changes and muscle contractions. The patient is typically asked to swallow during the procedure to facilitate the advancement of the catheter and to gather data on the contractility of the esophagus. The results of the study are displayed on a manometry monitor as a two-dimensional (2D) graph, which provides a visual representation of the esophageal contractions. In the context of CPT® Code 91013, the study includes additional stimulation or perfusion techniques, such as the administration of a cholinergic agent like Mecholyl or an acid perfusion study, to further evaluate esophageal function. These enhancements allow for a more comprehensive assessment of esophageal motility and can help identify dysfunctions that may not be apparent through standard testing alone. The physician interprets the results and generates a detailed report, which is essential for guiding further clinical management of the patient.