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
The Center for Treatment and Study of Anxiety at the University of Pennsylvania
OCD Advanced Supervision 2013-2014
Dr. Elna Yadin, University of Pennsylvania
Exposure and Response Prevention Certification 2015
The Behavioral Therapy Training Institute
Licensed Psychologist (PSY 23800) 2010
State of California
National Certified Counselor 2010


American Psychological Association
California 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


Ms. Sarah Carr, LMFT is a Licensed Marriage and Family Therapist (MFT104418). Ms. Carr helps adolescents and adults navigate challenges that include anxiety, phobias, panic, obsessive-compulsive disorder (OCD), and body-focused repetitive behaviors (trichotillomania and skin picking). Ms. Carr is trained in evidence-based therapies that include cognitive behavioral therapy (CBT), exposure and response prevention (ERP), acceptance and commitment therapy (ACT), andmindfulness-based stress reduction (MBSR).

In addition to her work in private practice, Ms. Carr is a lead therapist for choicetherapy’s intensive outpatient program where she supports adults and teens who are struggling with moderate to severe OCD or anxiety. Ms. Carr is also a mindfulness-based stress reduction teacher (MBSR) and facilities regular MBSR and OCD groups in San Francisco.

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 is dedicated to supporting people to move towards their goals by helping them to connect to what is most meaningful in their lives. She is also passionate about continuing to expand her own knowledge of culturally competent practices that are supported by scientific research. More information about Ms. Carr can be found at www.sarahcarrtherapy.com.


Master of Arts (M.A.) – Clinical Psychology with an Emphasis in Marriage and Family Therapy
Pepperdine University; Malibu, CA; 2012 – 2014

Bachelor of Arts (B.A.) – Psychology; Film and Media Studies
University of Rochester; Rochester, NY; 2006 – 2010


California Licensed Marriage and Family Therapist, 2018
Mindfulness-Based Stress Reduction Teacher Qualification, 2017
Trauma-Informed Mindfulness for Youth Facilitator Training, 2015
Acceptance and Commitment Therapy Bootcamp Training, 2018
IOCDF Pediatric Behavior Therapy Training Institute Training, 2018


Northern California Cognitive Behavioral Therapy Network
Association for Contextual and Behavioral Science
California Association for Marriage and Family Therapists
International OCD Foundation


mindfulSF, San Francisco, CA

choicetherapy, San Francisco, CA
Lead Therapist for Intensive Outpatient Program (IOP)

University of San Francisco, San Francisco, CA
Adjunct Faculty

Seneca Family of Agencies, San Francisco, CA
Therapeutic Behavioral Services Clinician

UCLA OCD Intensive Treatment Program, Los Angeles, CA
Clinical Trainee

Ocean Park Community Center, Los Angeles, CA
Clinical Trainee

Karla Ulloa

Karla PictureMs. Karla Ulloa is a San Francisco native and graduated from the University of San Francisco in May of 2018 with her Master’s in Counseling Psychology. Ms. Ulloa has received training in Cognitive Behavioral Therapy (CBT) and Exposure and Response Prevention (ERP) under Dr. Mazza’s supervision.

Ms. Ulloa brings to the team many years of experience serving her community through mentoring, teaching job-related readiness skills, workshop facilitation, and case management skills. Ms. Ulloa 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.