Eric Sellers, MD

Now accepting new patients at our RMG Thornton locations.

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Kyley Leroy, DO

Now accepting new patients at our RMG Arapahoe in Littleton locations.

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Our physicians provide the care you need, the care you want, and the care you deserve

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Convenient Online Appointment Requests.

Easily request an appointment at any of our locations through our secure website. Click “Request an Appointment” above to get started.

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Nutrition. Health. Counseling.

RMG’s Nutritional Counseling program has been a huge success with our patients, as Kara Siedman, RDN, CDE, CLT and Nicole Lindel, RDN and Gabrielle Vandergriff, RDN have all treated thousands of patients for everything from weight loss, to chronic GI issues, to overall nutritional help. In March, RMG’s Nutritional Counseling ads Gabrielle Vandergriff, RDN to the team. Kara, Nicole & Gabrielle can help you meet your health needs and goals – so make your health a priority and request an appointment today.

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Questions? Comments? Compliments?

RMG wants to hear from you! If you have something to say, need additional help – please go under our “For Patients” drop down, and select “Patient Feedback” and let us know what you think of RMG

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Dedicated. Brilliant. Experts.

Our Gastroenterologists know all about GI disorders and the best forms of treatment.

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Convenient. Smooth. Nearly Painless.

Rest assured that our approach to minimally invasive procedures will get you in and out quickly.

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Office Visit

Satellite Offices



Arapahoe Endoscopy Center

(a HealthOne facility)
1001 Southpark Dr.
Littleton, CO 80120

Phone: 303-722-8987
Fax: 303-722-2935

Aurora Endoscopy Center

(a HealthOne facility)
14272 East Evans Ave

Aurora, CO 80014

Phone: 303-205-1090
Fax: 303-205-1091

North Denver Endoscopy Center

10001 N. Washington St.
Thornton, CO 80229


RMG Arapahoe in Littleton

1001 Southpark Dr.
Littleton, CO 80120


RMG Arapahoe Southwest

6169 South Balsam Way #320
Littleton, Colorado 80123


RMG Aurora

1444 S. Potomac St., #100
Aurora, CO 80012


RMG Brighton

1610 Prairie Center Parkway Suite #2230
Brighton, CO 80601


RMG Centennial

13111 East Briarwood Avenue #300
Centennial, CO 80112


RMG Green Valley Ranch

4809 Argonne Street #200 / Denver 80249


RMG Lakewood

355 Union Blvd Suite #200
Lakewood, CO 80228


RMG Midtown

4500 E. 9th Ave., Suite 560
Denver, CO 80220


RMG Thornton

10001 N. Washington Street 

Thornton, CO 80229


RMG Westminster

14300 Orchard Pkwy,
Westminster, CO 80023, USA


Rocky Mountain Gastroenterology

RMG to host 19th Annual GI Pow Wow April 4th, 2020

Registration is Now Open at

Rocky Mountain Gastroenterology is set to host our 19th Annual GI Pow Wow Conference on Saturday, April 4th 2020 at the Hyatt Regency-DTC. This conference is designed to provide a Gastroenterology & Hepatology update to community primary care providers, nurses, specialists, surgeons, medical oncologists & radiologists. All member of the healthcare community are welcome to attend this FREE event!

Rocky Mountain Gastroenterology Associates Serves Denver

Rocky Mountain Gastroenterology (RMG) is home to the leading gastroenterologists in the Denver, CO area. For more than 20 years, our team of gastroenterology specialists has been providing exceptional treatment for a wide range of issues. Our board-certified doctors have the training and expertise to care for patients dealing with abdominal pain, colon cancer, gallstones, pancreatic disorders, and much more. We have 15 offices throughout the Rocky Mountain region, so you can be sure we are never far from your Colorado home. If you are experiencing any problems with your digestive tract, let us know. We are committed to providing safe, successful solutions daily. Call us today to learn more.

We Have Several Convenient Locations to Serve You

We know that traveling to and from appointments with your gastroenterology doctor can be taxing, so we have several convenient locations throughout the Denver area to make it easier to get the medical attention you need. Rocky Mountain Gastroenterology operates six clinics, four satellite clinics, four technologically-advanced Endoscopy Centers, and a specialized pathology laboratory. We see patients for routine appointments at our various medical offices but perform most of our gastroenterology procedures at our Endoscopy Centers. Our specialists also practice at leading hospitals as well as throughout the community to spread our reach even further.

Our Team Has Extensive Expertise

Our gastroenterologists perform almost 30,000 procedures annually. Many of these procedures are routine – such as colonoscopy screening or hemorrhoid banding – but we also complete highly-specialized operations such as liver biopsies. We have several missions, including preventative care and reactive treatment. With each, we endeavor to promote health and well-being among all of our patients. We achieve this using state-of-the-art equipment that you will not find at any other facilities throughout the region.

RMG Partners with Various Local Hospitals

To make things easier for each of our patients, we are affiliated with many of the hospitals in and around the Denver, CO area. As a result, we have access to additional resources and experts to help accurately diagnose and treat any gastroenterology condition you may have. However, because we stand alone in the industry, treatment at Rocky Mountain Gastroenterology is much less expensive than that which you would receive at a hospital. We are regularly among the most cost-effective groups in the area, offering procedures at one-half or even one-third the cost of those performed in hospitals. Additionally, we accept most insurance policies, so your out-of-pocket expenses may be minimal.

Contact RMG With All Your Gastroenterology Concerns

Whether you are dealing with problems related to your esophagus, intestines, liver, pancreas, or stomach, the gastroenterology specialists at Rocky Mountain Gastroenterology can help. Our gastroenterology doctors have the most up-to-date technology to care for your ailment. We can screen for any potential issues or perform gastroenterology procedures to combat any symptoms or medical emergencies. If you are in or around Denver, Colorado, we have a state-of-the-art facility near you. Contact us today to schedule an appointment.


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