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For all your digestive health concerns, trust Advanced Gastroenterology.

Dr. Son T. Do, Dr. Samuel K. Sim, and Dr. Frank Yeh have extensive experience treating all types of digestive disorders. In addition to performing colonoscopy and upper endoscopy, our gastroenterologists provide:

  • Advanced evaluation of persistent heartburn and gastroesophageal reflux disease (GERD). Dr. Do and Dr. Sim offer tests called esophageal manometry and esophageal pH testing to accurately diagnose your condition.
  • Minimally invasive radiofrequency ablation for treatment of Barrett’s esophagus, a precancerous condition of the esophagus.
  • Diagnosis and treatment for irritable bowel syndrome, Crohn’s disease, ulcerative colitis, diarrhea, constipation and other digestive problems.
  • Capsule endoscopy, or PillCam®, to evaluate occult bleeding, anemia, Crohn's disease, and many other conditions – all you need to do is swallow a small capsule that contains a tiny camera. The camera captures thousands of images as it travels painlessly through your digestive system.
  • Evaluation of the bile ducts with a technique called endoscopic retrograde cholangiopancreatography, or ERCP.
  • Hemorrhoid care and banding - a safe, highly effective treatment program.

The specialized care you & your doctor can trust for:

  • Colon cancer screening & prevention
  • Persistent heartburn & GERD
  • Irritable bowel syndrome
  • Crohn’s disease & ulcerative colitis
  • Constipation
  • Diarrhea
  • Abdominal pain
  • Ulcers
  • Liver problems
  • Pancreatitis
  • Rectal pain & hemorrhoids
  • Difficulty swallowing

For further information please visit our Medical Library.

If you need to make an appointment please call 360-576-5060, or use the online Appointment Request form.