Gastroenterologist in Tucson, AZ

Dr. Miguel A. Arenas is board certified in Gastroenterology and Internal Medicine. Please see below to learn more about his specialty, medical education, and professional affiliations.

  Miguel A. Arenas, MD

Miguel A. Arenas, MD, Gastroenterologist

Miguel A. Arenas, MD, Gastroenterologist

Dr. Arenas is the founding member of MGSC. He is native from Peru. Dr Arenas received his medical degree from the San Agustin National University in Arequipa, Peru. Graduating with honors, he went on to pursue his medical training in the United States. After medical school he completed his internship and residency in Internal Medicine at the THMEP-University of Arizona program. Wanting to further specialize, he then completed a fellowship in Gastroenterology at the University of Arizonain 2007. He is board certified in Internal Medicine and Gastroenterology. He is married to a Tucson native Katie Belk-Arenas and they have two children.  In his spare time, Dr Arenas enjoys playing the guitar and mandolin, fishing and other outdoor sports. He is active in community events and his son’s schools.

Dr. Arenas performs Endoscopic Ultrasounds (EUS) which allows him obtain images and information about the digestive tract and the surrounding tissue and organs, including the lungs.

Currently accepting new patients

Principal specialty: Gastroenterology
Secondary specialty: Internal Medicine
Residency: 2001-2004
Fellowship: 2007-2007
Academic appointments: clinical instructor THMEP-UA program
Board certification: Internal medicine 2004, Gastroenterology 2008
In practice since 2007

American College of Gastroenterology
American Society of Gastrointestinal Endoscopy
American College of Physicians
American Medical Association
Honors Patient’s Choice Award 2008
Languages available: Spanish


Cindy Chang, Nurse Practitioner

Cindy Chang

Cindy is a native of Tucson, Az. She attended the University of Arizona earning a degree in Molecular and Cellular Biology (BS). She has degrees in Nursing from Pima College (LPN & ADN), Northern Arizona University (BSN), and The University of Phoenix (MSN). She graduated Summa Cum Laude “with highest distinction" in her programs.

As a member of Southern Arizona Advanced Practice Nurse- Nurse Practitioner Society, she is passionate about practicing evidence-based medicine with a belief that health is a state of physical, mental, and social well-being. Prior to Mesquite Gastroenterology, she worked in the hospital setting and physical rehabilitation facilities.

In her free time she enjoys cooking, gardening, furniture restoration, and spending time outdoors with her Husband and young Sons.

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Hours of Operation

Our Regular Schedule

Mesquite Gastroenterology and Surgery Center


8:00 am-3:00 pm


8:00 am-3:00 pm


8:00 am-3:00 pm


8:00 am-3:00 pm


8:00 am-12:00 pm






  • "Jackie Camargo is an individual who truly loves what she does and that is evident from the moment you walk through her door. She is warm, caring, good listener and a truly excellent provider. I would recommend her to all of my family and friends."
  • "Jackie is amazing. Very thorough and such a pleasure!! My results were exactly what I was looking for and I would recommend her highly to anyone."
  • "I had literally tried EVERYTHING for weight loss with no success until I met Jackie. Her clear and easy plan helped me drop 25 lbs in 8 weeks. I would recommend her to anyone who is serious about making a change and needs the proper guidance and accountability."
  • "I love Dr. Arenas and his staff. I had two endoscopic procedures and all was smooth. Good follow up . Professional and highly recommend. Sandra Voorhis"
    Sandra V
  • "Jackie is the best. She is the most supportive healthcare provider I have ever dealt with. With her help, I lost just under 60 pounds and have learned to keep it off. She’s always a text or call away for support or questions. I would recommend her services to anyone that wants real, long lasting weight loss support."