CBT for Anxiety, ADHD and Chronic Pain
Offices in San Francisco

About Our Team


Our team consists of Psychologists, Marriage and Family Therapists, and Behavioral Specialists trained in:

  • Cognitive Behavioral Therapy
  • Acceptance and Commitment Therapy
  • Exposure and Response Prevention
  • Mindfulness

Marisa T. Mazza, Psy.D

Dr. Marisa T. Mazza is a clinical psychologist and founder of choicetherapy. She successfully created and operates an individual therapy practice and intensive outpatient program in San Francisco. Dr. Mazza is passionate about providing evidence-based therapies, such as Cognitive Behavioral Therapy, Exposure and Response Prevention, Acceptance and Commitment Therapy and Compassion Focused Therapy, to teens and adults struggling with OCD or Anxiety. She enjoys supporting individuals in learning new ways of interacting with thoughts and feelings. Her approach allows individuals to face their fears in a gradual and gentle way so they can get unstuck from thoughts and feelings and live meaningful lives.

Dr. Mazza is certified in exposure and response prevention for OCD through the Center for Treatment and Study of Anxiety at the University of Pennsylvania and the Behavioral Therapy Institute. She has also received training in CBT, ACT, and CBT. Dr. Mazza is on the board of OCD SF Bay Area, the International OCD Foundation’s local affiliate, and is the Vice President of the San Francisco Bay Area Association for Contextual Behavioral Science, our local ACT chapter. She is adjunct faculty at the University of San Francisco and provides supervision and consultation to other professionals who want to lean more about the treatment of OCD.


Doctorate of Psychology (Psy.D.) – Clinical Psychology
California School of Professional Psychology at Alliant International University;
San Francisco, CA; 2005-2009

Master of Science (M.S.) – Counseling Psychology
Pace University; Pleasantville, NY; 2003-2004

Bachelor of Arts (B.A.) – Psychology
Pace University; Pleasantville, NY; 1999-2003


Exposure and Response Prevention Certification 2013
Licensed Psychologist (PSY 23800) 2010
National Certified Counselor 2010


American Psychological Association
California Psychological Association
San Francisco Psychological Association
San Francisco Bay Area CBT Network
Association for Contextual and Behavioral Science
Internation OCD Foundation
OCD SF Bay Area


University of San Francisco, San Francisco, CA
    Adjunct Faculty

Frugé Psychological Associates, Inc., Oakland, CA
    Director of Training

California State University, East Bay, CA
    Adjunct Faculty

San Mateo Medical Center, San Mateo, CA
    Internship and Post-Doctoral Resident

Walden House, Inc., San Francisco, CA


Sarah Carr, M.A

Sarah_PictureSarah Carr, M.A. is a registered Marriage and Family Therapy Intern treating clients under Dr. Marisa Mazza’s supervision. Sarah helps adolescents and adults navigate challenges that include anxiety, depression, obsessive-compulsive disorder (OCD), and body-focused repetitive behaviors (trichotillomania and skin picking). Sarah primarily uses cognitive behavioral therapy (CBT) and mindfulness-based interventions, which are empirically validated approaches for treating anxiety, depression, and OCD.

Sarah received her Master’s in Clinical Psychology with an emphasis on Marriage and Family Therapy from Pepperdine University. She has extensive training in CBT, mindfulness, and exposure and response prevention (ERP). In addition to her work in private practice, Sarah trained at the UCLA Intensive OCD Treatment Program, where she helped people recover from OCD through engagement in CBT techniques including ERP. She is currently in a multi-year training process to become certified as a mindfulness-based stress reduction teacher (MBSR), through the University of Massachusetts.

Sarah has worked with diverse populations that include homeless adults, at-risk families, and foster youth. She has also facilitated various mindfulness and cognitive restructuring groups. Sarah has worked with families and schools to create behavior management programs for children and adolescents struggling with behavioral difficulties.

Sarah is dedicated to her work with individuals and families, and to supporting people to move towards their goals by helping them to connect to their personal values. She is also passionate about continuing to expand her own knowledge of culturally competent practices that are supported by scientific research.


Karla Ulloa

Karla PictureKarla Ulloa is a San Francisco native and is currently a graduate student at the University of San Francisco. She is working on obtaining her Master’s in Counseling Psychology. Karla has received training in Cognitive Behavioral Therapy (CBT) and Exposure and Response Prevention (ERP) under Dr. Mazza’s supervision.

Karla brings to the team many years of experience serving her community through mentoring, teaching job-related readiness skills, workshop facilitation, and case management skills. Karla has experience working with diverse populations that include LGBTQ youth, individuals with developmental disabilities, adolescents, and homeless adults. She enjoys supporting others in living successful and independent lives.