© Copyright 2026 American Medical Association. All rights reserved.
The CPT® Code 91035 refers to a specialized diagnostic procedure known as the esophagus gastroesophageal reflux test, which is specifically designed to assess gastroesophageal reflux disease (GERD). This test involves the placement of a mucosal attached telemetry pH electrode, which is a sophisticated device that measures the acidity levels in the esophagus. The procedure is particularly beneficial for patients who exhibit symptoms indicative of GERD or for those who have been diagnosed with GERD but are not experiencing relief from standard treatment options. The test utilizes a capsule that contains a pH probe, a battery, and a transmitter, which is introduced into the esophagus through the nose or mouth. Once positioned, the capsule adheres to the esophageal mucosa, allowing for continuous monitoring of pH levels over a period of 24 to 48 hours. This data is crucial for understanding the frequency and duration of acid exposure in the esophagus, which can help guide treatment decisions. The procedure is non-invasive, and the capsule is designed to detach naturally from the esophagus after a few days, passing through the digestive system without the need for removal. The results of the test are analyzed by a physician, who then provides a comprehensive report based on the recorded data, aiding in the diagnosis and management of GERD.
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