Centers of Excellence




Michael Lavoie, PhD, has served as Phoenix Children’s Clinical Director of Psychology and Neuropsychology since 2002.  An experienced researcher, teacher, and practitioner, Lavoie’s work has positioned him as an influential contributor at the Hospital and in the community.  He is an Associate Clinical Professor of Pediatrics at the University of Arizona College of Medicine in Tucson and an Adjunct Professor in Clinical Psychology at Arizona State University. Additionally,he is an active member of the National Academy of Neuropsychology, International Neuropsychological Society, American Psychological Association, Division 40 - Clinical Neuropsychology, Division 12 - Clinical Psychology, and the Arizona Psychological Association. Dr.Lavoie completed his doctorate in Clinical Psychology with a Neuropsychology Proficiency at the California School of Professional Psychology in Fresno, California.Dr.Lavoie served as a clinical neuropsychologist in Massachusetts for many years before joining Phoenix Children’s.


John Barton, PhD, ABPP, is the Training Director & Director of Pediatric Psychology Services. Dr. Barton is a pediatric psychologist specializing in ADHD, learning disorders, and patients coping with epilepsy and recurrent abdominal pain, has been with Phoenix Children’s since 1997.  He has been practicing in Phoenix since 1984, serving as a psychologist and clinical director of several practices throughout the Valley. Today, Barton is a Senior Lecturer and Director of the Clinical Psychology Center at Arizona State University, where he provides supervision to therapists-in-training as part of their doctoral program.  Barton is an active member of the American Psychological Association, National Register of Health Service Providers in Psychology, Society for Pediatric Psychology, Arizona Psychological Association, and Arizona Kidney Foundation. Barton earned his doctorate in Clinical Psychology from Arizona State University, and APA-approved program. He is certified by the American Board of Professional Psychology in Clinical Child and Adolescent Psychology.


Janet Blackham, PhD, is a Neuropsychologist who joined Phoenix Children’s in 1999, is a pediatric psychologist with a special interest in developmental issues, pediatric rehabilitation, and assisting patients with cochlear implants. A member of the American Psychological Association and Arizona Psychological Association, she is an Adjunct Faculty member in the Department of Clinical Psychology at Arizona State University. Blackham earned her doctorate in Clinical Psychology at The Fielding Institute in Santa Barbara, California. Prior to joining Phoenix Children’s, Blackham worked in private practice, at several school districts, and for St. Joseph’s Hospital and Medical Center.  




Veronica Bordes-Edgar, PhD  (Neuropsychologist)






Ginger Carlson, PhD, ABPP



John Fulton, MD, ABPP/CN (Neuropsychologist), Training Director, Neuropsych Fellowship Program






Mark Popenhagen, PsyD, is a psychologist with clinical specialization in Pediatric Psychology, Pain Management, and Palliative Care. He received his doctoral degree at the Minnesota School of Professional Psychology (currently Argosy University), in Egan, Minnesota. After completing his fellowship in Pediatric Psychology at St. Jude Children’s Research Hospital in Memphis, Tennessee, he continued on as their pain psychologist. He went on to pursue further pain management and palliative care opportunities at the University of Colorado/Children’s Hospital of Denver and Loyola University Medical Center/Ronald McDonald Children’s Hospital in Maywood, Illinois. Popenhagen joined Phoenix Children's Hospital in early 2013, and is serving as the Program Director of the Complex Chronic Pain Program.




Jeanette Smith, PhD, Jeanette Smith, PhD, is a pediatric psychologist. After receiving her bachelors in Experimental Psychology at the University of California, she worked as a special education teacher in Massachusetts and as an outpatient counselor and behavior management specialist. In 1991, Dr. Smith received her PhD in Clinical Psychology at West Virginia University in Morgantown, West Virginia. After completing her clinical and post-doctoral fellowship from Children’s Hospital Harvard Medical School in Boston, Massachusetts, she worked as a Psychology Consultant at St. Joseph’s Hospital and Medical Center in  Phoenix, Arizona as well as a school psychologist and in private practice before joining Phoenix Children’s Hospital in 2001. She provides resident/intern training and developed and obtained American Psychological Association accreditation for pre-doctoral intership program here at Phoenix Children's.



Walanda Smith, PhD, is a pediatric psychologist who joined Phoenix Children’s in 2005. She is a specialist in social support and psychological well-being for patients with sickle cell disease and diabetes. She is an active member of the American Psychological Association, Arizona Psychological Association,and National Association of Black Psychologists. Smith earned her masters and doctoral degrees in Clinical Psychology at Fordham University in Bronx, New York.  She completed psychology internships and postdoctoral training at Bellevue Hospital and Medical Center in New York, New York, and at St. Joseph’s Hospital and Medical Center in Phoenix, Arizona. In addition to having served on the faculty of Northern Arizona University, Smith has also worked at Arizona State Hospital, at the Brooklyn Center for Psychotherapy, and in private practice.  She is certified by the Arizona Board of Psychologist Examiners.



Marika A. Maris, PhD, joined Barrow Neurological Institute at Phoenix Children's Hospital this year as a post-doctoral Psychology Fellow. She obtained her master’s degree in Counseling at John Hopkins University in Baltimore, Maryland and performed her internship at the Orlando VA Medical Center in Orlando, Florida. Before arriving in Phoenix, Dr. Maris worked as a Research Assistant and Research Program Coordinator at John Hopkins School of Medicine. She has a worked with a diverse population in several roles including: an international child extern in Trinidad, a Psychology Extern and a Neuro-psychology pre-doctoral adult fellow. 




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Christine Grist, Administrative Assistant

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