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Meet The Administrative, Medical & Behavioral Health Team



Emily Brandt, M.D. FAAP

james van decar M.D., FAAP

Dr. Van Decar is a neurodevelopmental pediatrician with more than 30 years of experience serving children with special needs and is an expert in the evaluation, diagnosis, and management of developmental disabilities in children. He retired from the Air Force in 2015 after a 28-year career spanning medical school at the Uniformed Services University of the Health Sciences in Bethesda, Maryland, residency in pediatrics and fellowship in developmental disabilities in San Antonio, Texas, and then multiple assignments including Lakenheath Air Force Base in England, Wright Patterson Air Force Base in Ohio, and Eglin Air Force Base in Florida.  In addition to the exceptional care he provided to thousands of military dependent children with special needs, he also established one of the Department of Defense (DoD)’s first early intervention programs for children when their families were stationed overseas. He advocated for them through efforts to reform the DoD’s Exceptional Family Member Program, and worked to improve Tricare’s Autism Demonstration Program. Dr. Van Decar is a member of the planning committee for the American Academy of Pediatrics Developmental Pediatrics board review course, and also consults with the Florida State University Autism Center.  In addition, he was recently appointed by the Governor of Tennessee to the State Interagency Coordinating Council for Early Intervention Services.



Michelle Cahill Kimball, MSN, CPNP-PC, PMHS

MICHELLE CAHILL KIMBALL, MSN,  CPNP-PC, PMHS

Michelle is a certified pediatric nurse practitioner with more than a decade of experience.  She has additional board certification as a pediatric primary care mental health specialist which builds on the pediatric nurse practitioner role to provide advanced assessment, evaluation, diagnosis and treatment of common developmental, behavioral and mental health problems in children and adolescents.  Prior to joining Siskin Children’s Institute in early 2010 she worked in a private pediatric primary care office for 9 years.  Michelle received her baccalaureate degree from the University of Tennessee at Chattanooga and her Master’s degree from Emory University.  She serves as a preceptor for undergraduate nursing students and graduate nurse practitioner and physician assistant students for several local programs.



Megan McCullah, PA-C

MEGAN MCCULLAH burrows, PA-C, MSPAS

Megan is a certified Physician Assistant who received her baccalaureate degree from East Tennessee State University in Biology and Psychology.  From there she obtained her Master’s in Physician Assistant Studies degree from Alderson-Broaddus College in Phillipe, West Virginia.  Her last year of training was spent at Wheeling Hospital in Wheeling, WV where her passion for pediatrics began.  Megan has five plus years in both primary care pediatrics and family practice.  Megan is thrilled to be part of the team at  Siskin Children’s Institute and begin practicing with the outstanding medical team and caring for families and children with special needs. 

Megan McCullah, PA-C

amrita uttamchandani, Psy. D.

Dr. Uttamchandani  is a Clinical Psychologist with expertise in developmental delays. Dr. Uttamchandani’s particular specialty is working with children and adolescents who exhibit behavioral and emotional problems. She provides support for parents while working with children and adolescents to identify their struggles and develop adaptive ways to resolve them. Her perspective encourages collaboration between teachers, parents, family, and healthcare providers as they support the well-being of the child. Dr. Uttamchandani  conducts psychological assessments to provide diagnosis clarification and treatment recommendations. She provides therapy in English, Hindi and Urdu, and, for clients who do not speak those languages, she is trained to provide therapy in the presence of an interpreter. 

Stephanie Cooper-Wilkes

stephanie cooper-wilkes

Stephanie Cooper-Wilkes is the Director of Healthcare Administration for the Siskin Center for Developmental Pediatrics. She joined Siskin as the Business Manager in April 2012.  Stephanie currently has over 12 years in medical practice management experience. Prior to joining Siskin, Stephanie was a Regional Practice Manager for Erlanger Health Systems, where she managed several physician practices.  While employed as the Practice Manager for Erlanger, Stephanie led several offices through start-up, survival, turnaround and growth modes. From 2005 through 2009, Stephanie was a Billing Office Manager for a Plastic Surgery Group located in Atlanta, GA.  Stephanie managed the daily operations of billing in excess of several million/yr. Stephanie’s goals as the Practice Manager for Siskin Developmental Pediatrics office are first, adhering to the Siskin mission, along with prioritizing the support of high-quality patient care and satisfaction.