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Our Providers

Dr. Shabbir Jamali, MD

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.

Dr. Shabbir Jamali

Dr. Ali Hashmi, MD

Board Certified in Gastroenterology

Dr. Ali Hashmi completed medical school from Aga Khan University. He completed his Internal Medicine Residency and Gastroenterology Fellowship from Baylor College of Medicine. After finishing fellowship, he joined the faculty of University of Texas Medical Branch (UTMB) in Galveston as an Assistant Professor. After practicing at UTMB for two years, Dr. Hashmi moved to Boston, Massachusetts, where he worked at the Mass General and Brigham community physician organization for four years. In 2021, Dr. Hashmi moved back to Houston, Texas, to join the Gastroenterology Diagnostic Center.

During his faculty tenure at UTMB, Dr. Hashmi actively participated in clinical research and authored numerous manuscripts. He was also a pioneer of the GI Surgical Conference, a multi-disciplinary conference focused on complicated patients and procedures.

Dr. Hashmi is a Board Certified Gastroenterologist and is an active member of the following GI societies:

  • American Gastroenterological Association
  • American College of Gastroenterology
  • American Society of Gastrointestinal Endoscopy
  • Texas Society of Gastrointestinal Endoscopy
  • Texas Medical Association
In his free time, Dr. Hashmi likes to play squash and explore new biking trails with his two daughters.
Dr. Hashmi

Kristine L. Houselog, CNP

Ms. Houselog is a certified nurse practitioner at Gastroenterology Diagnostic Center. Her expertise includes everything regarding solid organ transplants and gastroenterology. She is motivated to ensure she provides sympathetic and high-quality care to all of her patients. She works hard to create trust-based relationships with all her patients by assessing the situation and then explaining the best ways her patients can be treated.

Ms. Houselog graduated from South Dakota University, receiving her master’s in arts and science in nursing. In addition, she received her board licensing as a nurse practitioner. She later worked as a nurse practitioner at Avera Gastroenterology in which she treated patients with issues related to the GI.

Ms. Houselog has moved to the Houston area to get closer to her family and children while also doing what she loves the most.

Kristine Houselog

Tashauna Causey, APRN

Tashauna completed her Masters of Science in Nursing at the University of Texas at Arlington. Shortly after graduation, she obtained her certification as a Family Nurse Practitioner. She was born and raised on the Gulf Coast of Mississippi where she completed her Bachelor’s of Science in Nursing at the University of Southern Mississippi in 2017. Upon completion of her BSN, her family relocated to Houston, Texas. In her free time, she enjoys making new experiences, spending time with family and friends, and traveling. She has worked as a Lead Staff nurse for UT Physicians Gastroenterology for the last three years while also obtaining her degree. She prides herself on delivering the same high quality of care to her patients as she would expect her family to receive. She strives to establish long-lasting relationships with her patients based on trust and empathy. Her goal is to ensure her patients are educated about their care, so they are confident in their treatment plan.
Tashauna Causey, APRN
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