Physician-led primary care built on access, continuity, and trust.

Tomas G. Rios, MD

Founder · Board-Certified Internal Medicine Physician

Tomas G. Rios, MD, is a board-certified internal medicine physician and founder of Rios Healthcare Associates in Houston, Texas. He founded the practice with the goal of creating a more personal, accessible, and patient-centered model of primary care.

Dr. Rios earned his medical degree from Saint Louis University in 2010 with a distinction in research. He completed residency training in internal medicine at the University of Texas Health Science Center at Houston and went on to complete an additional year of training in cardiovascular medicine.

During training, Dr. Rios gained clinical experience through rotations at major Houston institutions, including The University of Texas MD Anderson Cancer Center, the Texas Heart Institute/Baylor St. Luke’s Medical Center, Memorial Hermann Health System, and Harris Health Lyndon B. Johnson Hospital.

In 2015, Dr. Rios began practicing as a hospitalist at Baylor St. Luke’s Medical Center, where he cared for complex and critically ill patients in a multidisciplinary hospital setting. In 2018, after becoming frustrated with the depersonalized nature of modern healthcare, he founded Rios Healthcare Associates to build a practice where patients’ needs come first.

Nicolin Neal, MD

Board-Certified Internal Medicine Physician · Geriatric Medicine

Nicolin Neal, MD, is a board-certified internal medicine physician and an integral part of the Rios Healthcare Associates team. She provides highly personalized primary care with a strong focus on prevention, chronic disease management, geriatric care, and whole-person health.

Dr. Neal earned her medical degree from Saint Louis University School of Medicine. She completed training in internal medicine at the University of Texas at Houston and fellowship training in geriatric medicine at Baylor College of Medicine.

In her professional work, Dr. Neal has focused extensively on geriatric care. She has presented research at American Delirium Society National Conferences, authored a chapter in Ethical Considerations and Challenges in Geriatrics, and helped educate medical colleagues in the care of older adults.

Patients appreciate Dr. Neal’s warm and welcoming approach. She takes time to listen, understand patient concerns, and consider how social, emotional, and mental health interact with overall health and wellness.

Through her work at Rios Healthcare Associates, Dr. Neal helps patients feel heard, supported, and guided through their care.