• CHPG Southwest - Gastroenterology

  • About CHPG Southwest - Gastroenterology

    Centura Health Physician Group Southwest (CHPG) - Gastroenterology is a full service clinic that screens for, diagnoses, and treats a range of disorders of the esophagus, stomach, small and large intestine, biliary tract, liver, gallbladder, pancreas, colon, and rectum, including:

    • Autoimmune disease in gastroenterology/hepatology
    • Celiac disease
    • Colon polyps and colon cancer
    • Constipation
    • Crohn's disease
    • Diverticulosis and diverticulitis
    • Esophagitis and stricture
    • Gall bladder disease
    • Gastroesophageal Reflux Disease (GERD)
    • Gastrointestinal disorders in pregnancy
    • Heartburn ("Acid Reflux")
    • Helicobacter Pylori (stomach infection)
    • Hemorrhoids
    • Hepatitis A , B and C
    • H. pylori infection
    • Inflammatory bowel disease
    • Irritable bowel syndrome (IBS)
    • Lactose intolerance
    • Liver disorders (the full range)
    • Pancreas disease
    • Peptic ulcer disease (PUD)
    • Polyposis syndromes
    • Rectal Bleeding
    • Swallowing disorders
    • Ulcerative colitis
    • Unexplained abdominal pain

    Some procedures are performed in our physician clinic, and others may be performed at Mercy Regional Medical Center, which offers a range of diagnostic and therapeutic services.  

  • Our Providers

  • Dr-LopezWeb.jpgDr. Orlando Lopez-Roman is board certified in gastroenterology and internal medicine. He graduated from University of Texas Southwestern Medical School and completed fellowships in gastroenterology clinical nutrition at University of Chicago Hospitals and in gastroenterology at Veteran Affairs Caribbean HealthCare System in Puerto Rico.
    Dr. Nathan VoiseGastroenterologist Nathan Voise, DO, earned his doctor of osteopathic medicine degree from Oklahoma State University Center for Health Sciences. He completed his fellowship in gastroenterology at Oklahoma State University Medical Center in Tulsa. Dr. Voise moved to Durango with his wife and two children.
  • Procedures and Treatments

    • Colonoscopy / colon cancer screening
    • Esophageal dilation or dilation of strictures
    • Esophageal pH exam
    • Flexible sigmoidoscopy
    • H. Pylori Breath Test
    • Small Bowel Capsule Endoscopy
    • Upper Endoscopy (EGD, Gastroscopy)


    Monday through Friday, 8:00 a.m.-4:30 p.m.

    Contact Information

    Appointments: (970) 764-3800


    Mercy Medical Plaza, Suite 255, on the Mercy Regional Medical Center Campus 
    1010 Three Springs Blvd., 
    Durango, CO 81301
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