Staff at PCI Westlake Centers

Meet our wonderful staff!

Miriam Hamideh, Ph.D.

Clinical Psychologist, PSY 17320
Executive and Clinical Director

dr hamideh

Dr. Miriam Hamideh is a licensed clinical psychologist. She holds a Ph.D. in Clinical Psychology, a master-level certificate in Psychoanalytic Theory and Practice, and a Bachelor’s degree in Clinical Psychology. Having practiced psychology for over 20 years in diverse clinical settings, she has extensive experience with anxiety, depression, mood disorders, psychosomatic illness, relationship problems, dual-diagnoses, and substance abuse. Her psychodynamic therapeutic approach helps patients to understand how their thoughts and actions affect the way they feel. However, Dr. Hamideh also integrates developmental psychology, and includes cognitive-behavioral techniques, which help the learning of new skills to deal with immediate stressors and work toward deeper personal growth.

In addition, Dr. Hamideh has extensive experience with cultural diversity and acculturation problems. She speaks Portuguese and Spanish fluently among other languages, and has worked extensively with people from diverse cultural and religious backgrounds. Moreover, She taught graduate level university courses and still trains other professionals to become more culturally competent. Dr. Miriam Hamideh became a faculty member of the Psychology Graduate Program at California Lutheran University in 2002, where she taught for six years. She is currently a member of the Graduate Psychology Advisory Council for CLU.

Moreover, she was invited to assist with the creation of the Cultural Diversity committee of the Los Angeles County Psychological Association (LACPA) in 2005. Dr. Hamideh served as Board member, chairing and co-chairing the Diversity committee for 7 years until 2017. Finally, she is a member of both the California Psychological Association, and the American Psychological Association.

Joshua Diamond, M.D.

Board-Certified Addiction Specialist

Medical Director

Joshua Diamond is a renowned board-certified physician that specializes in Internal Medicine and Addiction Medicine. He graduated with dual bachelor degrees in Philosophy and Biology with honors from the University of Southern California. Dr. Diamond received his medical degree with Dean’s Recognition from the USC Keck School of Medicine. He then completed his post-graduate residency training in Internal Medicine at Cedars Sinai Medical Center. Dr. Diamond has also completed additional training in Biomedical Ethics, Health Informatics, and Addiction Medicine. He previously served as Medical Director for an acute inpatient detox unit and has an established private practice. Dr. Diamond’s approach to medicine carefully blends a strong evidence-based scientific approach to ensure high quality care coupled with an individualized and compassionate bedside manner to deliver a comprehensive and personalized healthcare experience.

Annie Zadori, Ph.D. 

Registered Psychologist Assistant (PSB 94024455)

Supervised by Miriam Hamideh, Ph.D


Dr. Annie Zadori is a registered psychological assistant who specializes in the treatment of anxiety related disorders including Obsessive Compulsive Disorder, Phobias, Panic, Body Dysmorphic disorder and other mood related disorders. Dr. Zadori focuses on the integration of Cognitive Behavioral Therapies including Dialectical Behavioral Therapy (DBT), Exposure Response Prevention (ERP), and Habit Reversal. She strives to teach her patients the tools they will need to continue in their lives independently and confidently.

Dr. Zadori earned her Master’s and Doctorate in Clinical Psychology from Alliant University and remained in training with the Anxiety Disorder’s Clinic team at UCLA throughout her externship years to the present. Having been raised in culturally diverse settings has allowed Dr. Zadori to further appreciate acculturation processes and facilitate therapy with ethnic minorities. She is also fluent in Farsi and Armenian and a major part of her concentration in research has been focused on international approaches to mental health treatment.

Crystal Ferrendelli, PsyD

Registered Psychologist Assistant (PSB 94025500)

 Supervised by Miriam Hamideh, Ph.D
 Pronouns: She/Her/Hers Why Pronouns are Important