About Us

Committed to Advancing Digestive Health Through Innovation

Built on Expertise, Driven by Passion

Vitality Digestive Institute Clinical Research was founded by Dr. Tamerisa, Dr. Verma, and Sara with a shared vision to provide independent, high-quality digestive health research. After years of working with third-party clinical research organizations (CROs), they realized that they could achieve more by managing their trials in-house. By doing so, they could ensure that their values of integrity, innovation, and reliable data production remained at the core of everything they did. Their mission was simple: to deliver cutting-edge research and provide patients with access to advanced therapies while giving sponsors trustworthy results. What began as a dream of independence has grown into a company that aims to become the largest network of gastrointestinal (GI) clinical research providers in the Houston area.

Guided by Integrity, Committed to Innovation

At Vitality Digestive Institute, our mission is to advance the understanding and treatment of digestive diseases while providing patients with access to the latest in medical research. We are driven by four core values: high-quality healthcare, integrity, innovative treatments, and reliable data production. We believe that the best results come from keeping everything in-house, ensuring full alignment with both our patients’ needs and our sponsors’ goals. As we grow, our focus remains on delivering excellence in every trial, expanding our network of providers, and leading the way in GI clinical research.

Dedicated Experts in Digestive Health Research

Our team brings together decades of experience in gastrointestinal research, clinical care, and patient-focused treatment. Together, we are committed to improving the future of digestive health through our passion for science and innovation.

Dharmendra Verma, M.D.

Radha Tamerisa, M.D.

Sara Kelley

Diana Franco Corso, M.D.

Ami Patel, PA-C

Karen McEuen, FNP-C

Jessica Helms, FNP-C

Chelsea Beiser, PA

Dana Hong, NP

Dharmendra Verma, M.D.

Dharmendra Verma, MD completed his residency training in Internal medicine at University of Texas, Houston along with MD Anderson Cancer Center, where subsequently, he received subspecialty fellowship in Gastroenterology, Hepatology, and Nutrition.

Diana Franco Corso, M.D.

Dr. Franco is board-certified in Internal Medicine and Gastroenterology. She received her medical degree in her native country of Colombia. She completed her internal medicine residency and gastroenterology fellowship at the Mayo Clinic in Arizona. She then went to complete an advanced fellowship in Inflammatory Bowel Diseases in Cleveland Clinic, Ohio. Dr. Franco hopes to focus on gastrointestinal health for women.

Ami Patel, PA-C

Ami Patel, PA is a native Houstonian, who received her graduate medical training from the University of Texas Healthcare system, with further education and training in gastroenterology & Hepatology subspecialty.

Karen McEuen, FNP-C

Karen McEuen, MSN, APRN, FNP-C joined Gastro Health & Nutrition in 2023 as a full-time Advance Practice Registered Nurse and is board certified as a Family Nurse Practitioner through the American Association of Nurse Practitioners.

Jessica Helms, FNP-C

Jessica Helms, MSN, APRN, FNP-C joined Gastro Health & Nutrition in 2021 as a full-time Advanced Practice Registered Nurse and is board certified as a Family Nurse Practitioner through the American Association of Nurse Practitioners.

Chelsea Beiser, PA

Chelsea graduated from Baylor University in XXXX with a degree in XXX. From there she received her physician assistant degree from XXXX in XXXX. Chelsea has been serving as a PA for Dr. Tamerisa since XXXX.

Dana Hong, NP

Dana received her degree in XXXX from XXX in XXXX. She then received her NP from XXX in XXXX. She has been working for Dr. Tamerisa since 2024.