Centura Health

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Welcome to Northwest Gastroenterology Specialists
Designated a Center for Endoscopic Excellence

At Northwest Gastroenterology Specialists we treat and manage a full spectrum of conditions and diseases of the digestive system including:

  • Abdominal pain
  • Biliary disease
  • Colitis
  • Colon cancer
  • Colon polyps
  • Gallbladder and biliary tract disease
  • Gastroesophageal reflux (heartburn)
  • Hemorrhoids
  • Hemorrhoid Banding
  • Hepatitis
  • Hiatal hernias
  • Inflammatory bowel disease
  • Irritable bowel syndrome
  • Liver disease
  • Nutritional problems
  • Pancreatitis
  • Ulcers
  • Women’s health

We also perform a variety of procedures including colonoscopy screenings for early detection of colon cancer.

Our team includes two gastroenterologists: Scott Hallgren, DO, FACP, and Ariana Greenwood, MD.

Board certified in gastroenterology and internal medicine, Dr. Hallgren understands the importance of preventive care and has the experience and skills to help patients with digestive problems live a higher quality of life.

Dr. Greenwood is board certified in internal medicine and gastroenterology and completed her fellowship in Gastroenterology at the University of Colorado Health Sciences Center. Dr. Greenwood delivers high quality, data-driven care and wants her patients to feel they are on a shared journey to treat their illness.

The American Society for Gastrointestinal Endoscopy (ASGE) has recognized Avista’s endoscopy suites for their quality services which are used to diagnose and treat digestive disorders—from gastroesophageal reflux disease (GERD) to colon cancer. ASGE has designed the only national program recognizing quality and safety in the practice of GI endoscopy.



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