The experience you can trust for the important tests you need.

We understand that visiting the gastroenterologist may be a new experience for you and that you may be in pain or worried about your health. That’s why all the staff at Advanced Gastroenterology focus on making you feel comfortable and confident in our care. Dr. Samuel K. Sim, Dr. Frank Yeh, and our medical team take extra care to listen to your concerns, answer all your questions and thoroughly explain your condition and treatment options.

ERCP – Endoscopic Retrograde Cholangiopancreatography

Endoscopic Retrograde Cholangiopancreatography, or ERCP, is a specialized technique used to study the ducts of the gallbladder, pancreas and liver. Read more..

24-hour pH Study

An esophageal 24-hour pH test measures how often stomach acid or non-acid fluid flows into the lower esophagus and the degree of acidity during a 12-24 hour period Read more..

Esophageal Manometry

The esophageal manometry test measures the motor action of the muscles that are the upper and lower ends of the esophagus, as well as the motor function of the esophageal body. Read more..

BARRX Halo/ Barrett's Esophagus Ablation Treatment

Barrett's esophagus is a condition where the lining of the esophagus changes its structure to be more like the lining of the intestine. This is brought about by the leakage of stomach acid back in to the lower esophagus after food has been ingested - this is called reflux or gastroesophageal reflux. Our doctors use the BARRX Halo radio frequency treatment for Barrett's esophagus. Barrett's esophagus tissue is very thin and therefore responds well to the heat ablative energy of the HALO ablation technology without damaging the underlying structures. In clinical studies this treatment has proven to eliminate the diseased tissue of Barrett's esophagus in 98.4% of patients treated. Read more..

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