Meet Our Team

Our Adult ADHD clinic is built on a foundation of value, purpose, and action.  We strongly believe in autonomy, accountability, integrity, excellence, and teamwork.  We foster a culture of respect, trust, and reliability with each other and our patients. Everyone on our team is passionate about their work. We truly love what we do and have fun doing it.  

At EFC, we welcome our patients as our own family. We aim to provide a sense of unconditional support, personal connectedness, and genuine understanding. We dedicate ourselves to helping our patients succeed in every aspect of their lives. We believe these elements are necessary and vital in helping our patients with ADHD overcome their difficulties and achieve their life goals. 

Unity is strength. . . when there is teamwork and collaboration, wonderful things can be achieved. 

-M. Stepanek

Zaakir Yoonas, MD
Executive Director
Lawrence Choy, MD
Medical Director
Khaled Zaki, PMHNP-BC
Nurse Practitioner
Medication Specialist
Amy Archer, RDN
Registered Dietitian Nutritionist 
Carolain Peregrino, PMHNP-BC
Nurse Practitioner
Medication Specialist
Rachael Barreto, LCSW
Psychotherapist &
Executive Function Specialist
Regina Tyrkas
Clinic Manager
Lizl Pienaar
Office Administrator
Annie Cheng
Office Administrator​
Jazlyng Luu
Summer Intern