Education & Certification

Licensed In
New York

Graduated From
Hofstra University (1998)

National Register Member Since

Mark Terjesen, PhD

I am a licensed psychologist, credentialed as a health service psychologist by the National Register of Health Service Psychologists, a nonprofit organization established in 1974. The National Register credential signifies adherence to the highest standards of professional practice. I provide psychological assessment and treatment along with other preventive and consultative services. For more information on my areas of expertise, ages served, and other practice details, please see below. For more information on the National Register, see Thanks for visiting my profile page!

Learn more about me on my website:

Practice Characteristics

Areas of Expertise

  • Childhood and Adolescent Problems (e.g., ADHD, school/learning problems, social withdrawal, autism, recurrent abdominal pain, aggressive or oppositional behavior)
  • Anxiety (e.g., generalized anxiety, phobia, panic, obsessive-compulsive disorder)
  • Depression and Other Mood Disorders (e.g., bipolar disorder, major depression, bereavement)
  • Family Therapy (e.g., parent-child problems, divorce with kids, family illness)
  • Individual Psychotherapy
  • School Psychology (e.g., individualized education planning, placement, conduct problems, advanced placement)
  • Sleep Disorders (e.g., insomnia, nightmares, sleep cycle disorders)

Ages Served

  • Children (3-12 yrs.)
  • Adolescents (13-17 yrs.)
  • Adults (18-64 yrs.)

Treatment Modalities

  • Cognitive Behavioral Therapy

Insurance Plans

Does Not Accept Insurance

Contact Information

Primary Contact

This psychologist has elected not to publish contact information.

P: 516-780-0111 (Office)