Compassionate care team available to treat a variety of digestive health concerns
Whether you experience a touch of indigestion, constant stomach pain, or trouble swallowing, you deserve the best possible care.
Our team of experienced physicians at Adventist Health Hanford’s Gastroenterology Center uses state-of-the-art diagnostic, imaging and laboratory equipment to evaluate and treat the following digestive disorders:
- Gastroesophageal reflux disease (GERD)
- Inflammatory bowel disease (IBS)
- Gastrointestinal bleeding
- Crohn’s disease
- Colorectal cancer
- Esophageal disorders and cancers
- Stomach disorders and cancers
- Celiac disease
- Barrett’s esophagus
- Benign colon disease
- Ulcerative colitis
Diagnosing digestive disorders
In order to determine what is causing your symptoms, our specialists can perform a wide variety of diagnostic tests, including:
Colonoscopies: To check for colon cancer
Capsule endoscopies: To examine your small intestine
Esophagogastroduodenoscopy (EGD): Helps visualize the upper part of the gastrointestinal tract down to the duodenum.
Esophageal manometry: A test to assess motor function of the upper esophageal sphincter, esophageal body and lower esophageal sphincter.
Bravo reflux testing: A pH test that uses a capsule to capture esophageal pH data for up to 96 hours. This can help evaluate the frequency and duration of acid reflux to better understand your symptoms.
Digitrapper pH-Z testing system: A catheter-based test that uses both pH and impedance sensors to identify reflux at multiple locations, including the esophagus and pharynx.
Radiofrequency ablation of Barrett’s esophagus: Uses heat to remove precancerous tissue from the esophagus. Barrett’s esophagus patients treated with radiofrequency ablation are less likely to progress to esophageal cancer, compared to patients who undergo surveillance.
Treating your condition
Once your condition has been identified, our team can develop a comprehensive care plan tailored to meet your needs, which may include:
Dietary and lifestyle changes: Getting more exercise, avoiding certain foods and changing your lifestyle in other ways can make a big difference in your symptoms and condition. Our gastroenterologists can review these with you and help you implement healthy changes.
Endoscopic treatment: These forms of treatment can help with many different digestive disorders. Using advanced tools and technology, we can perform the appropriate procedure required to treat your condition.
Surgery: Sometimes, surgery is the best way to treat particularly severe digestive disorders. Our gastrointestinal surgeons ensure a safe and effective procedure from start to finish.
Meet Our Providers
Usman Rahim, MD
Dr. Rahim is board-certified in gastroenterology and internal medicine. Practicing medicine for more than a decade, he provides specialized care for concerns of the digestive and hepatic systems in adults.
Christopher Opriano, DO
Board-certified gastroenterologist Christopher Orpiano, DO, specializes in the diagnosis and treatment of patients with diseases and conditions affecting the liver, stomach, intestines and other digestive organs.
Kyle Ota, MD
Dr. Kyle Ota is dual board-certified in general surgery and colon and rectal surgery by the American Board of Surgery and the American Board of Colon and Rectal Surgery. Dr. Ota provides comprehensive general surgical care and is expert in colon and rectal surgical care. He guides patients through such concerns as hemorrhoids, anal fissures, diverticulitis, colon cancer and rectal cancer. His passion in this field of medicine stems from the data-driven nature of the specialty, which allows continual improvement for treatment options.
Shirley Pua, MD
Shirley Pua, MD, is board-certified in gastroenterology and brings more than 30 years of medical experience to her practice. She credits her dad for a career path in medicine and feels fortunate that she is a doctor able to help patients with gastrointestinal diseases.
Alvin Yiuwai Au, MD
Dr. Au is a gastroenterology specialist with over 37 years of experience in the medical field. He specializes in esophageal disorders, gastrointestinal disorders, and liver disease. He graduated from University of Texas- San Antonio Long Medical School medical school in 1983.
Boris E. Reznik, MD
Dr. Reznik is a gastroenterology specialist who specializes in gallbladder/bile duct diseases, esophageal disorders, and gastrointestinal disorders.
Ching-Fong C. Wu, MD
Dr. Fong is a gastroenterology specialist who specializes in esophageal disorders, gastrointestinal disorders, and anal & rectal disorders.
Satish Kesavaramanujam, MD
Dr. Kesava is a board-certified general and thoracic surgeon. Specializing in the newest diagnostic advances and treatments for digestive health concerns, his expertise includes in a wide range of surgical interventions for concerns such as gastroesophageal Reflux Disease (GERD), diverticulitis, hiatal hernia, colon cancer and thyroid conditions.
General Surgery: Adventist Health Physicians Network
125 Mall Drive, Suite 211A
Hanford, CA 93230
Surgical Specialties: Adventist Health Physicians Network
951 East Merritt Avenue
Tulare, CA 93274
Medical Office: Adventist Health
300 S. Leon S. Peters Boulevard
Fowler, CA 93625
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5400 West Hillsdale Avenue
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