Quillen ETSU Physicians encourages preventative care for children so that they carry healthy habits into adulthood. We provide your child state-of-the-art care for the best chance possible at a healthy life.

We are a proud provider of PCMH (Patient-Centered Medical Home) and CPC+ (Comprehensive Primary Care) Click the links to learn more

Meet Our General Pediatricians

Dawn Tuell, MD

Dr. Tuell is a professor and Chairman of Pediatrics at ETSU Quillen College of Medicine. She completed her medical degree and residency at the ETSU/QCOM in Johnson City, TN. She earned a Bachelor of Science degree from Emory University.

Dina M. Alshunnaq, M.D.

Dr. Alshunnaq completed her medical education at the University of Jordan in 2008 and her pediatric residency at Quillen College of Medicine. 

William S. Dodd, M.D.

Dr. Dodd completed his medical education at the Quillen College of Medicine, TN  and her residency at East Tennessee State University. Dr. Dodd has a concentrated focus on adolescent medicine. He graduated with honors in 2014. Having more than 5 years of diverse experiences.

Jodi Gage, MD

Dr.Gage  completed her medical degree at East Tennessee State University James H. Quillen College of Medicine in 1998 where she completed her residency in 2001.


Dr. Gage has practiced general pediatrics in Northeast Tennessee for 17 years. Choosing to stay and serve the children and families of the community in which she lives. She has been married to Trevor Gage for the past 23 years and has 3 children - Chad (19 yrs), Kaelyn (17 yrs), and Jason (15 yrs).

Gayatri Bala Jaishankar, MD

Dr. Jaishankar completed her medical education at the Sri Ramachandra Medical College and Research Institute, MD in 1991 and her residency at East Tennessee State University in 1997.

Robert M. Tolliver, PhD

Matthew Tolliver, Ph.D. is a Clinical Psychologist and Assistant Professor in the ETSU Department of Pediatrics at the Quillen College of Medicine. Dr. Tolliver provides brief psychological interventions to patients and families in pediatric primary care, alongside an interprofessional team of physicians, nurses, social workers, and a nutritionist. He supervises psychology and social work students who provide behavioral health services in the clinic. He also helps lead quality improvement initiatives and contributes to the education of medical students and medical residents in the department. Dr. Tolliver’s professional interests include disseminating evidenced based interventions in a primary care setting to rural and underserved populations, and behavioral health workforce development. He grew up in Berea, KY and is a lifelong UK Basketball fan.

Brandi Johnson, LMSW

Brandi N. Johnson LMSW is a clinical social worker in our department of pediatrics. A Clinical Social Worker (LCSW) is a social worker who provides individual, group and family therapy to assess, diagnose, treat, and prevent mental illness, as well as emotional and behavioral disturbances. The role of social workers and clinical social workers differs, their goal is the same: to act as an advocate for and improve the lives of their clients.

Demetrio R. Macariola Jr., MD

Dr. Macariola earned a Bachelor of Science in Medical Technology (magna cum laude) a Doctor of Medicine from the Divine Word University in Tacloban, Leyte, Philippines. His medical training included: a rotating internship at the Medical Center Manila in Manila, Philippines; volunteer physician in the Rural Health Unit in Santa Rita, Samar, Philippines; pediatrics residency at Texas Tech University Health Sciences Center in Amarillo, TX (Chief Resident for one semester); and a fellowship in pediatric infectious disease at the Cincinnati Children's Hospital in Cincinnati, OH.

Debra Mills, MD

Dr. Debra Mills completed her doctorate in Medicine at East Tennessee State University in Johnson City, TN in 1993. She performed her residency at Naval Medical Center Portsmouth, VA, 1996. Dr. Mills has served in leadership roles for the following organizations: 

  • TN State SLC & CPIT Advisory Board

  • Medical Director Children’s Advocacy Center of the First Judicial District: 2001-present

  • Child Protection Investigative Team Advisory Board Appointed 2014 State of Tennessee Department of Children’s Services; James M. Henry-Commissioner

  • Connecting for Children’s Justice Steering Committee 20015. Nashville, TN

  • AAP SOCAN (Section on Child Abuse and Neglect) National Conference and Exhibition (NCE) Program Committee. 2013, 2014, 2015

  • Second Look Commission Appointed 2010 State of Tennessee - Tennessee Commission on Children and Youth Nashville, TN

Karen Schetzina, MD

Dr. Schetzina completed her medical degree at University of North Carolina School of Medicine, Chapel Hill in 1997. She completed her residency at Stanford University Medical Center in 2001. She conducts research in General Pedatrics and Epidemilogy.

David L. Wood, MD, MPH

Dr. Wood is board certified by the American Board of Preventative Medicine and Public Health, American Board of Pediatrics, and American Board of Quality Assurance and Utilization Review Physicians. 

He received a medical degree and a masters in public health from the UCLA Schools of Medicine and Public Health in Los Angeles, CA. He completed an internship in Pediatrics at the Harbor UCLA Medical Center in Torrance, CA. He was a resident in Preventative Medicine and Public Health at the UCLA and Los Angeles County Public Health Department in Los Angeles, CA.Then, he was a Pediatric Resident at UCLA in Los Angeles, CA. He received an Agency for Helathcare Research and Quality (NCHSR) Fellowship in Health Services Research, RAND Corporation and Fellow, Primary Care Pediatrics, UCLA School of Medicine, Pediatrics, and Division of General Pediatrics. 

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