Heather Mazursky Horowitz PhD

Dr. Heather Mazursky-Horowitz

Licensed Clinical Psychologist


Heather Mazursky-Horowitz, Ph.D

Dr. Heather Mazursky-Horowitz is a licensed clinical psychologist with expertise in the application of cognitive-behavioral and behavioral approaches to address anxiety, ADHD, disruptive behavior problems, mood disorders, and interpersonal difficulties. She received her Bachelor’s degree in Psychology from the University of Rochester, Master’s degree from Columbia University Teacher’s College, and her Doctoral degree in Clinical Psychology from the University of Maryland, College Park.

Dr. Mazursky-Horowitz has provided therapy, evaluation, and consultation services across a range of settings, including Children’s National Medical Center in Washington, D.C., where she worked with children and adolescents with chronic illness; Westchester Jewish Community Services, where she provided individual, group, and family psychotherapy as well as psychological evaluations with children, adolescents, and adults; and Montefiore Medical Center where she worked with individuals ages 0-21 helping parents manage childhood tantrums, picky eating, and toilet training as well as helping adolescents and young adults manage their own life stresses. Dr. Mazursky-Horowitz has particular expertise in treating anxiety disorders across the lifespan in both individual and group settings and makes the goal of therapy for individuals to learn the skills necessary to live a meaningful life outside the walls of the therapy room.

She provides individual therapy (child, adolescent, and adult), behavioral parent training, and group therapy, and is a certified Parent-Child Interaction Therapy (PCIT) therapist. Dr. Mazursky-Horowitz integrates principles from evidence-based practices to best support the individual needs of each patient. She provides CBT in a warm and supportive manner, offering strategies and skills that help children and adults manage their emotions in a healthy way.

  • Children
  • Adolescents
  • Adults
  • Individual
  • Groups
  • Parents


University of Rochester

Dr. Heather Mazursky-Horowitz received her B.A. in Psychology from the University of Rochester.

Teacher’s College of Columbia University

Dr. Mazursky-Horowitz earned her M.A. in Psychology from Teacher’s College of Columbia University.

University of Maryland

Dr. Heather Mazursky-Horowitz earned her Ph.D. in Clinical Psychology from the University of Maryland, College Park.


Cognitive Behavioral Therapy

Cognitive behavioral therapy (CBT) is a form of psychological treatment that has been demonstrated to be effective for a range of problems. Research studies suggest that CBT leads to significant improvement in functioning and quality of life. In many studies, CBT has been demonstrated to be as effective as, or more effective than, other forms of psychological therapy or psychiatric medications.

Anxiety Disorders

There are several types of anxiety disorders, including generalized anxiety disorder, panic disorder, specific phobias, agoraphobia, social anxiety disorder and separation anxiety disorder. Anxiety disorders can cause people into try to avoid situations that trigger or worsen their symptoms.

Evidence-Based Treatment

Evidence-Based Treatments (EBT) are based on scientific evidence. Psychologists and other mental health care professionals who use EBTs are dedicated to offering the best level of care available by constantly evaluating and comparing the effects of various treatments for a variety of children’s and adolescents’ mental health problems.

Disruptive Behavior Disorders

Disruptive behavior disorders (DBD) can seriously impact a child’s daily life. Children with disruptive behavior disorders show ongoing patterns of uncooperative and defiant behavior. Their responses to authority figures range from indifference to hostility. Their behavior frequently impacts those around them, including teachers, peers, and family members.

Parent-Child Interaction Therapy (PCIT)

Parent-Child Interaction Therapy (PCIT) is a dyadic behavioral intervention for children (ages 2 – 7 years) and their parents or caregivers that focuses on decreasing externalizing child behavior problems (e.g., defiance, aggression), increasing child social skills and cooperation, and improving the parent-child attachment relationship.