Meet Our Doctors

Dr. Ramya Rangamannar earned her bachelor’s degree from Barnard College at Columbia University and her master's and doctorate degrees in Clinical Psychology from the University of Hartford. She completed her pre-doctoral clinical internship at the University of Florida and post-doctoral fellowship in pediatric neuropsychology at the Children’s Hospital Colorado.

Over the last decade, Dr. Ramya has gained clinical expertise in a multitude of settings (i.e., medical, psychiatric, private practice) with children from early toddlerhood through early adulthood. Despite specialization in pediatrics, Dr. Ramya has also worked with younger and older adult populations in her training. She prides herself on understanding the "whole child" in the context of their home/family, school, and social realms and in providing families with tangible resources and recommendations in supporting their child’s development and success.

Dr. Meghan T. Lee earned her bachelor’s degree from Colorado State University and both her master’s and Ph.D. from Auburn University. She furthered her education in Neuropsychology through UC Berkeley Extension and Brigham Young University.

Dr. Dorothy Nguyen-Daniels earned her doctoral degree with a concentration in neuropsychology from the Illinois School of Professional Psychology. She completed her pre-doctoral internship at Truman Memorial Veterans’ Hospital in Missouri and her two-year postdoctoral fellowship in neuropsychology at the University of Kansas School of Medicine-Wichita. In addition, she obtained a master’s degree in gerontological counseling from Adler University in Illinois.

Dr. Nguyen-Daniels provides comprehensive outpatient evaluations of adults and older adults presenting with various neurological conditions, including dementia, mild cognitive impairment, concussion/traumatic brain injury, neurodegenerative disease, stroke, cerebrovascular disease, epilepsy, movement disorders, autoimmune disorders, and complex medical/psychiatric conditions. She also has experience conducting pre-surgical evaluations (e.g., epilepsy, DBS) and inpatient consultations. In her clinical work, Dr. Nguyen-Daniels strives to use a thorough, compassionate, and culturally-sensitive approach that enables patients to understand better their strengths, areas of growth, and helpful resources to function and feel their best.

Nicole Liedike earned her bachelor’s degree in psychology from Wilmington University and her master’s and doctorate degrees in clinical psychology from The Chicago School of Professional Psychology. She completed her pre-doctoral internship in clinical psychology at a private practice in Colorado Springs, CO that primarily focused on neurodevelopmental, psychological, and neuropsychological assessments with populations ranging from 18 months of age in older adulthood.

Nicole’s training experience prior to her graduate career was in acute psychiatric hospitalization care working with adolescents, adults, older adults, and dual diagnosis populations. During her graduate career, she has worked with preschool-aged children in a school setting, and with adults and older adults in private psychological practice and outpatient medical settings providing therapeutic support and conducting psychological and neuropsychological evaluations. Her future career goal is to become a board-certified neuropsychologist focusing on assessment for traumatic brain injury and neurodegeneration populations. With her passion for neuropsychological assessment, Nicole is enthusiastic about completing her lifespan residency in clinical neuropsychology at Horizon Neuropsychological Services.

Dr. Molly Sullan earned her doctorate degree in clinical psychology, with a specialization in neuropsychology, from the University of Florida. She completed her pre-doctoral internship and her two-year neuropsychology fellowship at the VA San Diego Healthcare System/University of California, San Diego.

Dr. Sullan’s research has focused on understanding the relationship between post-traumatic sleep difficulties and cognitive, psychological, and physiological recovery for patients with a history of acquired brain injury (e.g., traumatic brain injury and stroke). Clinically, she has experience in the assessment of a broad spectrum of neurological disorders both in inpatient and outpatient settings, including brain tumors, epilepsy and movement disorders (e.g., Parkinson’s disease), memory disorders and dementia, stroke and cerebrovascular disease, traumatic brain injury, demyelinating lesions, autoimmune disorders, complex psychiatric concerns, substance use disorders, and neurodevelopmental considerations.

Dr. Sullan is an affiliate faculty member at Horizon, which means that she does not currently see patients clinically. She works in research and remains involved with the HNS didactic series related to the HNS training program.