Our Providers

Houston's Top Gastroenterologists

Shabbir Jamali

Dr. Shabbir Jamali, MD. PA

Board-certified Gastroenterologists

For more than ten years, Dr. Shabbir Jamali and his family have been a part of the Houston community and have made Northwest Houston home. His dedication to his patients is reflected in the pride he takes in his gastroenterology medical practice at the Gastroenterology Diagnostic Center of Tomball where he has practiced for over two decades.

Dr. Jamali completed his Internal Medicine Residency at Wayne State Medical Center in Detroit Michigan in 1987. During his time in residency, he was awarded the honor of ‘Best Intern of the Year’ for his outstanding performance in his work and studies. He then completed a Gastroenterology Fellowship at the University of Connecticut Health Center at Farmington, Connecticut, and was later board certified in both internal medicine and gastroenterology by the American Board of Internal Medicine (ABIM.)

Over the years, Dr. Jamali has been an active member of many national and regional professional societies and associations including: American College of Gastroenterology (ACG), American Society of Gastrointestinal Endoscopy, (ASGE), Texas Society of Gastrointestinal Endoscopy (TSGE), Texas Gulf Coast Gastrointestinal Society, Texas Medical Association (TMA), and the Harris County Medical Society (HCMS). Involvement at all levels of the medical community allows Dr. Jamali to stay abreast of the latest research and technical developments in the field.

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Avais Chatha

Avais Chatha, MD

Board Certified in Gastroenterology

Dr. Avais Chatha is a recent and excellent addition to our staff at Gastroenterology Diagnostic Center, Tomball. Dr. Chatha completed a post-doctoral research fellowship in pancreatic cancer at Massachusetts General Hospital / Harvard University, Boston and then completed his internship in General Surgery at New York Hospital Queens / Weill Cornell Medical College. He later received his board certification and completed his internal medicine residency at Winthrop University Hospital, New York. Dr. Chatha then completed a fellowship at the University of Mississippi Medical Center in the Department of Gastroenterology and Hepatology where he served as Chief Gastroenterology Fellow and received advanced training in Upper Endoscopy, Colonoscopy, ERCP, and Fecal Microbiota Transplant.

Dr. Chatha believes that continuing education in his highly technical field is essential as well as establishing and maintaining membership in major professional groups and associations. To these ends, Dr. Chatha is a member of the Texas Medical Association (TMA), Harris County Medical Association (HCMA), American Society of Gastrointestinal Endoscopy (ASGE), American College of Gastroenterology (ACG), and the American Gastroenterological Association (AGA).

Now settled in Houston, Dr. Chatha and his family are looking forward to spending time together, getting to know Houston, and cheering on the Rockets.

Reynalin Bailey

Reynalin Bailey, APRN, DNP

Doctors Jamali and Chatha are supported in their practice by Advanced Practice Registered Nurse, Reynalin Bailey. After receiving her Master of Science in Nursing from Angelo State University, San Angelo, Texas, Ms. Bailey continued her schooling and received an APRN certification also from Angelo State. Her academic focus was as a Medical-Surgical Clinical Nurse Specialist. In addition, she holds a Doctor of Nursing Practice from Texas Christian University, Fort Worth, Texas. In 2016 and 2018 she served as an online nursing faculty member at Angelo State delivering courses in Advanced Health Assessment.

Ms. Bailey also served as a Clinical Trial Sub-Investigator at the Permian Research Foundation from 2005 -2011 and maintains certification as a Gastrointestinal Advanced Practice Nurse (Gastrointestinal APN) from 2005 to the present. Her professional interests include liver diseases and functional bowel diseases. Ms. Bailey is an integral and important part of the Gastroenterology Diagnostic Center team and is available for patient questions and comments.

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GDC (Gastroenterology Diagnostic Center) Tomball 77375