Education & Certification

Licensed In

Graduated From
George Washington University (2009)

National Register Member Since

Mary Ellis, PsyD

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


    • National Register of Health Service Psychologists

Fee Information/Office Policy

  • Upon request
  • Health Care Plan Participation

  • Upon request
  • Contact Information

    Primary Contact

    Ellis Psychological Services, LLC
    1487 Chain Bridge Road, Suite 303
    McLean, VA 22101
    P: 703-790-0088 (Office)
    F: 703-940-0684