I. David Marcus, Ph.D.

Welcome To My Psychotherapy Practice.
I’m glad that you are here and can learn
about the areas in which I work.


Helping Individuals

For over 25 years I have provided therapy to people who are anxious, depressed and/or dealing with life transitions, including relationship changes, job changes and death and dying. A key element of individual therapy is developing an “observing self,” paying attention to yourself in a deep and specific way. Learning about your emotional states helps you to harness or manage them to have improved relationships and a happier life. To develop more control of your emotions you have to identify them physically inside your body, name them, understand what they communicate and respond rather than react. Our work together would be interactive, engaged and educational as you learn more about yourself to get what you want from life.

Helping Couples

As with individuals, I have helped couples for over 25 years. Together we will work to help you both develop your relationship into one that is collaborative and mutually supportive. My work with couples supports both of you to co-create an enduring and fulfilling “we” relationship. Couples therapy is often not about the issue being discussed and more about the process of how it is discussed. Successful relationships cannot be a “zero sum game”, that is where one person’s gain is exactly equal to another person's loss and, instead, must be based upon the understanding that “we are in this together.” Our work together would be interactive and engaged. I may serve as a type of relationship coach, while also folding in your relevant family of origin issues, so you can better understand and take care of each other.

Helping Individuals & Couples Dealing With Sex Addiction

Since 2000, I have helped individuals and their partners who have been harmed by problematic sexual behaviors. I have written about and taught other professionals how to help people with these issues after studying with Alvin Cooper, Ph.D. for many years. I provide individual therapy and groups to help men learn to develop more emotionally intimate relationships and to tolerate and gain interpersonal connection through the feelings that arise. I work with these individuals to gain a deeper understanding of their emotional lives, enabling them to have more control over their sexual behaviors and, instead, make life and relationship enhancing choices. I also help couples and partners to recover from harm caused by sex addiction or problematic sexual behavior. Our work together would be interactive,

Relevant Training Certifications

  • Intensive Short-Term Dynamic Psychotherapy (ISTDP), which is especially effective for anxiety and trauma.
  • I am a certified Level 2 therapist in Stan Tatkin’s Psychobiological Approach to Couples Therapy method.
  • I am a member of Society for the Advancement of Sexual Health (SASH).


Serving the San Francisco Bay Area, East Bay, and Silicon Valley, including San Jose, Palo Alto, Los Gatos, Mountain View, Redwood City, San Mateo, Milpitas, Fremont, and Santa Cruz.
I. David Marcus, Ph.D.  •  408.313.3365
1600 The Alameda Suite 104, San Jose, CA 95126