Willoughby, L. David

Adjunct Faculty
Licensed Marriage and Family Therapist
Registered Nurse

Career History

David has been a faculty member at Phillips Graduate Institute since 1999 and at CSUN since 2003. David has lectured and presented workshops on a variety of topics, including HIV, substance abuse, trauma and crisis intervention, workplace violence, team-building, psychopharmacology, and grief & loss. He has a private practice in the Fairfax district of Los Angeles. David is also a clinical supervisor for the Mitchell Family Counseling Clinic at CSUN and the Mental Health Services Department of the Los Angeles LGBT Center.


  • Master of Arts in Psychology, 1987
    Pepperdine University, Graduate School of Education & Psychology
    West Los Angeles, California
  • Bachelor of Science in Nursing, Madonna University, 1978
    Livonia, Michigan

Courses Taught

  • MFC 547-Psychopharmacology

Practice/Areas of Focus

David Willoughby is a Licensed Marriage and Family Therapist and Registered Nurse. As a therapist, he has worked with individuals, couples, and groups in a variety of settings, including hospital treatment programs, county clinics, and community service agencies. His private practice in Los Angeles focuses on couples and persons who are recovering from addictions and mood disorders, as well as couples experiencing growth and change in their relationships. His nursing career has included experience in emergency medicine, critical care, administration, and education.

Professional Organizations

  • Clinical Member, American Association of Marriage and Family Therapists
  • Clinical Member, Glendale Area Mental Health Professionals Association
  • Clinical Member, Lesbian and Gay Psychotherapy Association of Southern California


  • Willoughby, L. D. (2003). Role of the psychotherapist in the medication management of mental disorders: historical perspectives and critical issues. Progress: Family Systems Research and Therapy. 12, 15-23.