About Us

Gastro Associates and Endoscopy Center of Western Colorado, provides comprehensive gastroenterology and hepatology services for adults. The board-certified gastroenterologists provide high-quality, patient-centered care paired with strong clinical skills to ensure patients receive the best treatments available.

The full-service gastroenterology practice offers advanced testing and treatments to ensure patients get the most up-to-date care available, including endoscopy, colonoscopy, sigmoidoscopy, and high-resolution esophageal manometry. The team also specializes in InterStim for fecal incontinence, as well as hemorrhoid band ligation.

For advanced gastroenterology and hepatology care, call Gastro Associates today or request an appointment online.

Meet our team

Masi Khaja, MD


Dr. Khaja is a board-certified Gastroenterologist. He completed his internship and residency in Internal Medicine at New York Methodist Hospital affiliated with Cornell Medical School. Dr. Khaja completed his Fellowship training in Gastroenterology at Brooklyn Hospital affiliated with Cornell and Columbia Medical School. Dr. Khaja served as Chief Resident and Chief Fellow of Gastroenterology during training. He is published and involved in medical research trials.

Dr. Khaja has been in practice for over 15 years and has extensive experience in advanced diagnostics, therapeutic endoscopy, fecal incontinence, and hemorrhoid treatment. He is a member of the American College of Gastroenterology and American Society of Gastroenterology Endoscopy. He is also a member of the Texas Medical Association and Travis County Medical Society. His wife is an Emergency Physician and their two children reside in Austin, TX.

Joel Lans, MD, FACP, FACG


Dr. Lans joins Gastroenterology Associates of Western Colorado with more than 30 years of practicing the specialty of gastroenterology.

He received his medical degree from the Medical College of Wisconsin and completed his internal medicine residency and part of his GI fellowship at Wayne State University. He completed the third year of his GI fellowship in a therapeutic ERCP program in Wisconsin.

He practiced for one year in Fort Meyers, Florida; eight years in Champaign, Illinois and 20 years in Milwaukee, Wisconsin. Dr. Lans practiced for the last two years in Boise, Idaho where he set up a GI practice at a multispecialty clinic.

Dr. Lans is board certified in gastroenterology, is a fellow of the American College of Physicians and a fellow of the American College of Gastroenterology.

Dr. Lans is a fellow of the American College of Gastroenterology and is a member of the American Gastroenterology Association and a member of the American Society for Gastrointestinal Endoscopy.

He practices general GI including diseases of the upper and lower GI tract including reflux, peptic ulcer disease, diseases of the liver and pancreas and inflammatory bowel disease. He performs EGD, colonoscopy, capsule endoscopy and has a great passion for helping patients.

Dr. Lans has four adult children and one grandson. Outside of work his interests include hiking, biking, fitness, nutrition and spending time with his family. He is also an avid sports fan.

Deborah Borrego, ACNPC, AG, FNP, C

Nurse Practitioner

I am an ACNPC-ag and FNP-c dual certified NP. I have been an NP for 9 years.

I graduated from Mesa State College with my BSN in 2005 where I worked for a Plastic Surgeon as a first assist, I then went into Gastroenterology and the Cardiac Cath lab.

I then moved from Grand Junction to the Denver area where I worked in the Emergency Department at Denver Health and Aurora South.

I then decided to go back to school and get my MSN and NP. I graduated with my Acute Care Adult Geriatrics and Family NP. I started my NP career in Emergency Medicine in Corpus Christi Texas rotating through 4 Emergency Departments. I then came back to Colorado and moved to the mountains and started a cattle ranch while working as an NP in corrections and a rural ED. My husband then got a Wildland Fire Chief Job in Rifle so we moved to the Valley where I went back into Emergency Medicine.

I have 2 boys, my oldest is a junior in college currently working on his pre-veterinary medicine degree and college rodeoing. My youngest is 7 and loves baseball, hunting, and rodeo. When my husband isn’t fighting wildfires and I’m not working in medicine, we are busy with our cattle ranch, horses, rodeo, hunting, dirt biking, and baseball.

Through my personal experiences and nursing gastroenterology experience I have moved back into GI in hopes of helping others like myself struggling with GI issues.

Contact Us

We’d love to hear from you!

Please note, if you have a medical emergency, dial 911.

First Name*
Last Name*