Services tailored to every stage of development


  • Toddlers/preschoolers
  • School age children and adolescents
  • Young adults/college students


  • Individual psychotherapy
  • Cognitive coaching
  • Biobehavioral coping strategies


  • School observations
  • Consultation with teachers
  • Consultation with parents


Welcome to Developmental Neuropsychology Services (DNS), PLLC

DNS is the private psychology practice of Kristy Hagar, Ph.D. Dr. Hagar is a licensed psychologist located in Colleyville, Texas. Dr. Hagar provides a range of assessment, treatment, and consultation services to meet the needs of children, adolescents, and young adults. Our goal is to provide a continuum support as children grow and develop from preschool to young adulthood/college-age