“Safer At Home”​

In efforts to control the spread of COVID, we are now offering TeleHealth appointments as well as in-office visits. Your ongoing health concerns are important to us and we are committed to treating you while being conscientious of your exposure risks. Neglecting long-term health care needs can result in unwanted outcomes. Please call our office and our schedulers will help you identify the best route to allow us to meet your health care needs.

We are now scheduling Endoscopy Procedures as well.  Please call to schedule yours today.

For the procedures I had, I am very pleased with the service I received. The staff made me feel comfortable and with my numerous remarks, I could tell Dr. Khaja has a sense of humor. Thanks to you, Haley, as you explained the results of the tests and how to deal with any stomach discomforts!

John K.

Submitted 11/03/20

Words cannot accurately discribe how pleased I am with this office! Any questions I have Mindy is the sweetest thing and right there to answer my questions! She’s so helpful and gets back to me so fast it’s been so wonderful. Working with Haley and Zoey , who are just as helpful. I’m so grateful for this team and all of there hard work! You ladies are angels, God bless you!

Katelyn H.

Submitted 04/03/20

Overall I was happy with my care. I was especially impressed with Heather, my care provider, who spent much time with me and explained everything and answered all questions. I forget a couple things and I was able to email the office and got a response right away. Thanks to all.

Sharon W.

Submitted 02/18/20

Heather was great!!!

William A.

Submitted 12/09/19

I have been using this facility for about a year and although I am pleased with Dr. Khaja and his PA’s, the rest of his staff were less then professional. I almost left the practice over the incompetence of his worker bees. I had an appt this morning and I was shocked how the place has turned around since May…So pleasant and friendly…I finally felt like I was cared for… Christina at the front desk, Emelee and Jessi are MA’s, Haley the PA, Heather the NP and of course Mindy the office manager have gone above and beyond to make this place friendly and caring and I thank you from the bottom of my heart… Keep up the excellent work.

Cynthia B.

Submitted 09/16/19

Haley is outstanding she listens and has great bedside manner. I wasn’t to happy until I started seeing Haley. I hope she stays and she will bring the stars up on this place as it doesn’t have very good reviews but she genuinely cares about you and what’s going on and don’t know a couple other people there but they do the breath test and kidney stuff there super nice as well. Stomach issues are very difficult to figure out and it gets frustrating so it’s important to find someone that listens I know been dealing with it for 2 years now but Thanks to Haley I’m doing way better still have some bad days but good out number the bad 9 to 1 so huge improvement I actually go to work and feel like working and it’s been long time sense I felt this way it’s nice Thanks to all there

Cliff S.

Submitted 09/05/19

I’m happy with the care I have been receiving. I just wish I could see dr kahja instead of the nurse practitioner or PA, for my regular visits.. the only time I get to see my regular Dr is when I have to have a procedure.

Brandy M.

Submitted 09/05/19


Brandy M.

Submitted 09/05/19

The only staff that truly hears and listens about my issues. I probably wouldn’t even be as well as I am now or even alive still without them. 2 1/2 years and counting. This has to be best team in Colorado hands down!

Stephanie F.

Submitted 08/23/19

I just wanted to say that Heidi in billing was just wonderful! She was a great help in setting up payments. We can’t thank her enough! Also, thanks to all at GAWC.

A.J. And Susan S.

Submitted 08/13/19

The newest Office Manager Mindy has been amazing to work with. She has gone out of her way to help me with a billing issue and I am very grateful. All of the staff I have encountered have been kind and professional.

Shannon P.

Submitted 07/20/19

My colonoscopy went without a hitch, and with no pain. The staff were friendly and efficient. I highly recommend this facility.

Christa T.

Submitted 05/08/19

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Masi Khaja, MD

Masi Khaja, MD, is a highly qualified gastroenterologist providing specialist care for the population of Grand Junction, Colorado, at Gastroenterology Associates of Western Colorado.

Dr. Khaja grew up in the Morristown and Jersey City areas of New Jersey from the age of 10, after moving there with his family. His childhood dream was to become a doctor, and in 1999 he saw his dream come true when he graduated with a medical degree. He completed his internship in Brooklyn’s New York Methodist Hospital, an affiliate of Cornell University, where he felt drawn to the field of Gastroenterology, in which he now specializes.

Getting A Procedure? Visit the Endoscopy Center.

2460 Patterson Road, Grand Junction, CO 81505


We accept a wide range of insurance plans. Please call the office for additional information.


“I have been seeing Dr. Khaja for over 5 years and he has been great. Very knowledgeable and caring doctor.”



“The entire staff here is very kind and caring. They make having an unpleasant procedure a little better.”



“When I entered the office I was apprehensive, but I left with a sense of reassurance knowing that I was in good hands.”



Gastroenterology Associates of Western Colorado
604 25 Road
Grand Junction, CO 81505
Phone: 970-245-0990
Fax: 970-644-6446

Office Hours


8:00 am – 5:00 pm
8:00 am – 5:00 pm
8:00 am – 5:00 pm
8:00 am – 5:00 pm
8:00 am – 5:00 pm