
Welcome to
Horizon
Neuropsychological Services
Proudly serving the Denver Metro Area and Boulder, Colorado
Horizon Neuropsychological Services, LLC conducts neuropsychological evaluations for children, teens, adults, and older adults. Results provide diagnostic clarification and inform treatment planning.
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Neurodevelopmental Disorders
Neurodevelopmental disorders can affect various brain functions, including behavior, cognition, social interaction, and motor skills.
Autism, ADHD, Tic Disorders, Learning Disabilities
Learn MoreNeurocognitive Disorders
Neurocognitive Disorders (NCDs) describe changes in cognitive function beyond what would be expected for normal aging.
Traumatic Brain Injury (TBI), Cognitive Decline due to Medical Conditions
Learn MorePsychiatric Conditions
Psychiatric conditions encompass mental health disorders affecting thoughts, emotions, behavior, and well-being.
Anxiety (TBI), Depression, OCD, Psychosis, Trauma, Maladaptive Family Dynamics
Learn MoreIdentity Challenges
Identity challenges include struggles with cultural, religious, gender, or sexual identity acceptance and expression.
Gender Dysphoria, Difficulties with Peer or Family Acceptance, Conflicts Related to Cultural or Religious Identity
Learn MoreFrom a pediatrician's perspective, our comprehensive reports help inform decisions regarding medication intervention and multidisciplinary treatment planning. Unlimited consultation is available after, and our doctors are also willing to participate in the IEP process upon request.
Below are examples of how we help children and teens be the BEST version of themselves at any stage of development:
Cognitive Profile
Milestones
Learning Profile
Academic Assistance
Standardized Tests
Mental Health
Physical Health
Adulthood
Cultural Intersectionality
Understanding Neuropsychological Evaluations & Our Approach
A neuropsychological evaluation by a licensed clinical psychologist (PhD or PsyD) explores your child's unique brain-behavior relationship through interactive tests. We assess skills such as verbal, nonverbal, problem-solving, attention, memory, motor, adaptive functioning, academics, emotion regulation, and social communication.
Comparing your child's performance to peers identifies strengths and weaknesses, which are reviewed in the context of medical history, family background, culture, and education. Based on this, we diagnose and create a treatment plan to help your child reach their full potential. All information is documented in a report for parents and necessary treatment providers (per parent request).
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Meet Our Doctors
Our dedicated professionals bring a wealth of experience and expertise to Horizon Neuropsychological Services. With a shared commitment to personalized care, we are here to guide you toward optimal cognitive health and empowerment. Get to know the compassionate individuals behind our practice who are ready to support you every step of the way.
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Meghan T. Lee, Ph.D
Founder/CEO and Clinical Neuropsychologist

Ramya Rangamannar, Psy.D
Director of Pediatric Neuropsychology and Clinical Neuropsychologist

Meghan Lechuga, Psy.D
Director of Adult Neuropsychology and Clinical Neuropsychologist

Matthew Conway, Psy.D
Director of Operations and Clinical Neuropsychologist

Alison Datoc, Ph.D
Clinical Neuropsychologist and Concussion Specialist

Jacqueline Slemp, Psy.D
Clinical Neuropsychologist

Vanessa G. Williams, Ph.D
Clinical Neuropsychologist

Spenser Nye, Psy.D
Clinical Neuropsychology Resident

Kevin Ball-Duane, Psy.D
Clinical Neuropsychology Resident

Ashleigh Beaulieu, Psy. D
Clinical Neuropsychology Resident

Rachael Peck, Ph.D
Clinical Neuropsychology Resident

Casey Theriault, Psy.D
Clinical Neuropsychology Resident

Stacey Rowcliffe, Psy.D
Clinical Neuropsychology Resident

Molly Sullan, Ph.D
Faculty Affiliate
Locations
Littleton
7720 S Broadway
Suite 330
Littleton, CO 80122
Boulder
3000 Center Green Dr
Suite 230
Boulder, CO 80301
In-Home Testing
Our doctors currently offer in-home testing across the state of Colorado.
Telehealth Testing
Our doctors also offer telehealth testing appointments for appropriate evaluation needs.
(720) 242-7533
(720) 815-2613
Schedule An Appointment Today!
Evaluating youth ages 3+
