We Provide Gastroenterology Services in Colorado

Northern Colorado’s Leader in Digestive Health Care

The Centers for Gastroenterology is dedicated to providing the highest quality care for patients in Northern Colorado, Nebraska and Wyoming.

Our Services

Our Services

We see patients with a wide variety of problems and symptoms, including reflux, abdominal pain, constipation, diseases of liver, pancreas, and intestines.

Our Physicians

Our Physicians

Our physicians are board certified in Internal Medicine with additional Board Certification in the subspecialty of Gastroenterology.

What To Expect

What To Expect

Find answers to all your gastroenterology questions including information about symptoms and specific diseases.

Best Colorado Gastroenterologist

Centers for Gastroenterology is pleased to offer comprehensive gastroenterology services in Colorado. Our highly skilled and experienced team provides the highest quality care for patients with digestive disorders. The digestive system, which includes the esophagus, the stomach, the small intestine, the colon (large intestine), the gallbladder, attached bile ducts, the liver, and the pancreas, is an extremely important part of the human body. Not only does it play a vital role in the digestive process, but it also helps to absorb nutrients and eliminate waste. We strive to enhance our patient's quality of life through high-quality digestive care. Get in touch with us today to learn more about our gastroenterology services or to schedule your appointment.


Colon cancer is one of the most common forms of cancer in the United States. A colonoscopy is a screening test that can detect cancer before it has a chance to spread.  It can also find precancerous polyps that can be removed before they turn into cancer.

During a colonoscopy, a long, flexible tube with a tiny video camera on the end is inserted into the rectum and passed through the colon. The doctor is able to view the lining of the colon on a video monitor and look for any abnormalities that could indicate the presence of cancerous cells.

Bowel Incontinence

Bowel incontinence is often caused by an underlying medical condition that is very treatable. We offer InterStim therapy to patients who are not candidates for other treatment options.

Endoscopic Ultrasonography (EUS)

Endoscopic Ultrasonography (EUS) is an imaging technique that combines endoscopy and ultrasound. It allows the doctor to get a clear view of the layers of tissue in the GI tract as well as any surrounding structures, such as lymph nodes.

Flexible Sigmoidoscopy

Flexible sigmoidoscopy is a diagnostic procedure used to examine the lower part of the large intestine (the colon) and the rectum.


Manometry is a diagnostic test that assesses muscle function in the GI tract. It can be used to diagnose a number of conditions, such as achalasia, gastroparesis, and intestinal pseudo-obstruction.

Upper Endoscopy

An upper endoscopy, also called an EGD (esophagogastroduodenoscopy), is a diagnostic procedure used to examine the lining of the esophagus, stomach, and duodenum (the first part of the small intestine) and search for any abnormalities.

Infusion Therapy

Infusions are an excellent way for patients who cannot orally take medication to receive necessary treatments. We offer a variety of infusion therapies for a wide range of ailments.

Capsule Endoscopy (Pillcam)

After swallowing a tiny, pill-sized video camera, your doctor will be able to inspect the lining of the middle section of the GI tract.

Endoscopic Retrograde Cholangiopancreatography (ERCP)

We use ERCPs to examine the pancreas, gallbladder, and bile ducts.

Hemorrhoid Treatment

We use the CRH O’Regan System® to easily and painlessly treat hemorrhoids.

Flexible Sigmoidoscopy

Flexible sigmoidoscopy is a diagnostic procedure used to examine the lower part of the large intestine (the colon) and the rectum.

24-Hour PH Impedance Test

This is a diagnostic test used to assess the function of the lower esophageal sphincter (LES) as well as identify gastroesophageal reflux disease (GERD).

Recall Update

Centers for Gastroenterology has recently been made aware of a recall of one of our frequently used bowel prep medications, Magnesium Citrate. This recall includes all brands of over-the-counter Magnesium Citrate Laxative Oral Solution Cherry, Grape and Lemon Flavor manufactured at Vi-Jon, LLC. Please reference the list below from the FDA website (linked below) for the affected brand, NDC # and UPC #.

  • If you have purchased one of the affected bottles for an upcoming procedure, please return it to the store you purchased it from for a refund or replacement.
  • If you have recently used Cherry, Grape and Lemon-flavored Magnesium Citrate and feel you may have had an irregular reaction to the product, please report it on the FDA’s MedWatch Adverse Event Reporting program either online, by mail or by fax (information can be found on the FDA recall site).

FDA recall site

Vi-Jon, LLC site

Why Choose Us?

Centers for Gastroenterology is the premier choice for GI care in Colorado. Our Board Certified providers offer a full range of services from preventive screenings to the most advanced therapeutic procedures. We work with you to develop a treatment plan that meets your unique needs and provides the best possible outcome. Our team has been successfully treating GI disorders and other related conditions for more than 10 years, and we look forward to helping you elevate your quality of life.

Contact Centers for Gastroenterology

If you are experiencing GI symptoms or would like to schedule a screening, contact Centers for Gastroenterology today. We offer convenient scheduling and accept most major insurance plans. Give us a call or visit our website to schedule an appointment online. We look forward to meeting you!

Janus kinase inhibitors
Tofacitinib (Xeljanz)
Adalimumab (Humira)
Certolizumab (Cimzia)
Golimumab (Simponi)
Natalizumab (Tysabri)
Ustekinumab (Stelara)
Calcineurin inhibitors
IMDH inhibitors
The CDC’s Recommendations regarding the COVID-19 Vaccine & Booster shots can be accessed by clicking the links provided below.
See What Our Clients Are Saying
"I have been going to this practice for 18 years. I know I wouldn’t be here to write this review if it weren’t for Dr. Dunphy. She is an amazing doctor as well as an amazing woman. Absolutely the best in her field. I don’t know what I’d do without her."
-Stacey K.