Our Team
At Nu Leaf, our team of experienced mental health professionals is dedicated to providing compassionate, personalized support. Comprising licensed psychiatric nurse practitioners, psychiatrists, and wellness advocates, we are committed to helping individuals achieve emotional well-being in a safe and supportive environment.
Alex Sanchez, PMHNP-BC
Alex Sanchez is a Board-Certified, licensed Psychiatric Mental Health Nurse Practitioner (PMHNP-BC). He received his education with honors from California State University Long Beach (CSULB) and University of California Los Angeles (UCLA). He is a member of American Psychiatric Nurses Association, California Association for Nurse Practitioners, and Professor for a large private university. He is a California native who offers expert mental health care for anxiety, depression, ADHD, PTSD, bipolar disorder, stressful life events, and many more conditions. Alex brings over 5+ years of professional mental health experience. His goal is to help his clients live their best lives using modern, evidence-based care. He is an expert in modern psychopharmacology and helps personalize treatment solutions to best meet patient needs. He is also part of the leadership team with Nu Leaf Mental Health Group.
Julie Chu, PMHNP-BC
Julie Chu is a Board-Certified, licensed Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) who obtained her Bachelor of Science in Nursing from West Coast University and her Masters in Psychiatric Mental Health Nurse Practitioner from California State University Long Beach. With an extensive background in inpatient psychiatric care as well as inpatient chemical dependency, she specializes in primary mental health or dual diagnosis concerns. Approachable and meticulous in providing individualized care, she seeks to continuously provide a supportive treatment plan for her patients through compassionate care. She specializes in optimizing mental health via medication management, therapy, comprehensive diagnostic evaluations. She aims to establish trust and rapport with her patients by tailoring treatment plans to account for each person’s unique circumstances. In her free time, she loves to spend time with her family, explore good food around the area, and is always up to try something new.
Vanessa Diaz, PMHNP-BC
Offers Care in English/Spanish
Vanessa Diaz is a dedicated Board Certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC). Born and raised in Orange County, she has deep roots in her community, where she earned her Bachelor of Science in Nursing from West Coast University. Her commitment to excellence led her to pursue further education, graduating with honors from Maryville University with a Master of Science in Nursing.
Vanessa's practice philosophy is both evidence-based and client-centered, firmly rooted in the belief that every individual deserves personalized care tailored to their unique needs and goals. With a holistic approach to patient care, Vanessa integrates evidence-based treatment modalities, including pharmacologic management and psychotherapeutic interventions. But what truly sets her apart is her commitment to fostering a collaborative environment without judgment, where patients feel heard, valued, and empowered to embark on their journey towards stability, healing, and the restoration of mental health.
Vanessa's expertise spans across diverse populations and mental health settings. She deeply understands the vital importance of cultivating a secure and trustworthy therapeutic connection, especially when navigating through challenges such as anxiety, depression, bipolar disorder, ADHD, and beyond.
During her free time, Vanessa finds joy in spending quality time with her family and challenging herself through physical activities.
Katie Han, PMHNP-BC, AGNP-BC
Katie Han is a compassionate and dedicated Board Certified Psychiatric Mental Health Nurse Practitioner, holding a dual specialty certification in Adult-Gerontology Acute Care. She earned her Master of Science in Nursing degree from California State University of Long Beach. With numerous years of clinical experience, Katie has developed a wealth of expertise in managing a wide range of mental health conditions. These include anxiety, depression, ADHD, bipolar disorder, PTSD, and many others.
What sets Katie apart is her holistic approach to mental health care. Katie understands that every person is unique, and she tailors her care to meet the individual needs of each patient. Her treatment plans are thoughtfully designed to align with patients’ values and preferences, all while incorporating the latest evidence-based care approaches. She places a strong emphasis on holistic well-being, exploring therapeutic techniques, encouraging lifestyle changes, and promoting self-care practices that foster mental wellness and resilience.
Outside of her professional life, Katie enjoys spending quality time with her family. She’s an avid traveler with a passion for exploring diverse cultures and cuisines around the world
Sahil Mehta, PMHNP-BC
Sahil Mehta, PMHNP-BC, is a distinguished Board-Certified Psychiatric Mental Health Nurse Practitioner known for his unwavering commitment to exceptional patient care. His journey began with a Bachelor of Science in Nursing from West Coast University, followed by a Masters in Psychiatric Mental Health Nursing from Walden University, establishing a solid foundation for his practice.
Drawing from extensive experience in inpatient psychiatric care and chemical dependency treatment, Sahil specializes in addressing primary mental health concerns and concurrent dual diagnosis cases. His personalized approach to treatment is marked by meticulous attention to detail, crafting tailored treatment plans that seamlessly align with each patient's unique needs and circumstances. Sahil's holistic methodology integrates medication management, therapy, and comprehensive diagnostic assessments to optimize mental health outcomes. Central to his practice is the cultivation of trusting relationships, fostering an environment of empathy and empowerment where patients feel valued and supported. His commitment to excellence and patient-centered care help him facilitate positive transformations in the lives of those he serves.
Outside of his professional pursuits, Sahil finds joy in cherishing moments with his beloved wife, indulging in his passion for golf, and immersing himself in the natural beauty of the outdoors during his leisure time.
Christopher Woo, PMHNP-BC
Christopher Woo is a board-certified, licensed psychiatric mental health nurse practitioner (PMHNP-BC). He completed his Masters in Nursing in Clinical Nurse Leadership from the University of San Francisco and a Post-Masters Psychiatric Mental Health Nurse Practitioner certificate from West Coast University. He is an alumnus of the University of California, Davis where he completed his undergraduate studies.
Christopher has extensive experience working closely with a diverse demographic including veterans, immigrant communities, homeless, incarcerated populations, and students.
His treatment approach is collaborative with his clients, and provides modern evidenced-based treatment options that combine medication management with a holistic approach. He utilizes talk and cognitive behavioral therapy to address the root cause as well as tailored lifestyle modifications to treat the individual as a whole.
He specializes in anxiety, depression, ADHD, bipolar, and psychotic disorders. His goal is to empower his clients to live a meaningful life to their utmost potential.
Julian Saddi, PMHNP-BC
Julian Saddi is a Board-Certified, licensed Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) who obtained his Bachelor of Science in Nursing from Ohio University and his Masters in Psychiatric Mental Health Nurse Practitioner from Charles R. Drew University of Health & Sciences. He has an extensive background in both inpatient and outpatient psychiatric care as well as emergency medical and psychiatric services. He specializes in primary mental health care and dual diagnoses concerns which includes conditions such as depression, anxiety, PTSD, bipolar disorder, and many more.
Julian’s holistic approach to mental health care is individualized to meet each person’s unique needs and circumstances. His treatment plans are designed to align with the patient’s principles and values, while incorporating the latest evidence-based practice. Emphasizing overall well-being, Julian applies various psychotherapeutic modalities while encouraging beneficial lifestyle changes that promote self-care practices to enhance mental growth.
In his free time, Julian enjoys spending time with his family, take pictures, and explore the outdoors for its natural beauty.
Dr. Neal Adams, MD, MPH
Neal Adams, MD, MPH, is a Distinguished Fellow of the American Psychiatric Association. He is a Supervising Psychiatrist for Nu Leaf Mental Health’s Psychiatric Nurse Practitioners. He received his MD from Northwestern University, his MPH from Harvard University and completed his psychiatry residency at Stanford where he also served for two years as a Robert Wood Johnson Clinical Scholar. He was also a fellow in the California Health Care Foundation’s Leadership Program. Dr. Adams has served as President of the American College of Mental Health Administration and as Medical Director at the California Institute for Mental Health. Dr. Adams’ writings include a book entitled Person Centered Treatment Planning for Metal Health and Addiction Recovery as well as numerous policy monographs and journal articles. He has presented at local, national and international conferences and provides training on treatment plans, clinical outcomes management and evidenced based practice implementation. Dr. Adams has served in both clinical, administrative and leadership positions. He is also psychiatrist at Nu Leaf Mental Health Group
Dr. Robert Nastasi, MD
Dr. Nastasi is board-certified Psychiatry, Interventional Pain Management and Addiction Medicine Physician. He is a Supervising Psychiatrist for Nu Leaf Mental Health’s Psychiatric Nurse Practitioners. He is currently a Veteran’s Administration (VA) practitioner who serves as the Chief of VISN 9 Clinical Resource Hub TelePain Section. He oversees a multispecialty section that looks to help rehabilitate veterans and improve the quality of life for those suffering from chronic pain. He also serves in the role of VISN 9 Pain Consultant. He has extensive knowledge and experience in serving patients in the outpatient setting through Telehealth (Telepsychiatry). He has experience as a medical director of an inpatient psychiatric and addiction service hospital. He graduated with a Medical Doctorate from the State University of New York (SUNY) Upstate Medical University. He went on to complete his Transitional Year in Johnson City, NY. He then completed his residency trainings and fellowship at SUNY Upstate Medical University. He started his residency training in Anesthesia. After completion of his first year of residency in Anesthesia, he transferred to the Psychiatry Department where he completed his residency and also served as the Co-Chief. Following completion of his residency, he completed his fellowship in Interventional Pain Management.
He enjoys spending time with his family and two dogs. He also spends his free time training for triathlons, and surfing.
Dr. Codie Vassar, MD
Dr. Codie Vassar, a dedicated psychiatrist that is passionate about helping people and has a strong background in mathematics and science. With his expertise in psychiatry, he specializes in diagnosing, treating, and preventing mental illnesses for individuals aged six and above.
Dr. Vassar completed his undergraduate studies at the prestigious University of Wisconsin-Madison and earned his medical degree from the renowned Medical College of Wisconsin. Fluent in English and Spanish, he ensures effective communication with a diverse range of patients.
Dr. Vassar’s patient care philosophy revolves around collaboration, empowerment, and psychoeducation. He actively involves his patients in their treatment journey, encouraging shared decision-making and ensuring they have a thorough understanding of their condition and available treatment options.
Offering medication management and evidence-based psychotherapy, Dr. Vassar provides comprehensive care to promote mental health and well-being. He tailors treatment plans to each patient’s unique needs and values, embracing cultural sensitivity in his approach.
Patients can expect a warm and caring environment when visiting Dr. Vassar. His genuine concern for their well-being and commitment to their success in both health and overall quality of life create a trusting and supportive therapeutic relationship. Whatever the need may be—medication management or psychotherapy—Dr. Vassar’s expertise and genuine care will guide patients towards improved mental well-being.
Elizabeth Pham MSN, FNP-BC
Patient Care Coordinator
Elizabeth Pham is an experienced patient care coordinator at a Nu Leaf Mental Health. She brings a wealth of knowledge, experience, and compassion to the clients she serves. Elizabeth is a Board-Certified Family Nurse Practitioner. She has been working in the field of healthcare for the past 6 years, providing individual and group counseling, case management, and connecting patients with appropriate resources. She is passionate about helping her patients and their families find the best path for recovery. Elizabeth is a great listener and is always willing to go the extra mile to support her clients. She creates a safe, therapeutic environment for her clients and is dedicated to finding the best possible solutions for them. Elizabeth is committed to providing the highest level of care and is passionate about helping her clients reach their goals.
Anika Ang
Office Administrative Assistant
is a very hard-working person that prides herself in being responsible and organized, which reflects in the work that she puts out. She can easily adapt to changes in the work environment, and is a great team player. Additionally, her four-year experience in a diagnostic clinic has sharpened her communication skills that made her effective in developing rapport with clients, and handle their needs. Now that she has accomplished becoming a healthcare virtual assistant trained by HelloRache, Anika is eager and excited to use all the skills she has acquired to assist you with workloads and help maintain and further your company’s exceptional reputation.
Casey Cortes
Psychiatric Mental Health Nurse Practitioner (PMHNP-BC)
Casey Cortes is a board-certified and licensed psychiatric-mental health nurse practitioner (PMHNP-BC) who is committed to serving the patient population. She earned her Bachelor's and Master's degrees in Nursing from California State University, Los Angeles, where she developed her solid foundation in evidence-based practice.
Her diverse and extensive experiences in inpatient psychiatric and public health settings have allowed her to form a comprehensive understanding of the complexities of patient care. Guided by a deep compassion and respect for her patients, Casey adopts a genuine and collaborative approach to treatment. She utilizes active listening to foster a therapeutic environment that encourages open communication with patients and integration of lifestyle changes.
Compassionate, patient-centered care is the core of her practice and she ensures that each individual receives the support needed to be empowered and succeed in their mental health journey. Her background includes treatment of, but not limited to, Depression, Anxiety, Bipolar, Schizophrenia, and ADHD.
George June Timbal
Billing Coordinator
George is an accomplished customer service professional with over a decade of experience in the BPO industry. He has held roles in customer service, technical support, and supervision, demonstrating a strong ability to manage teams and handle customer inquiries.
George is well-versed in healthcare virtual assistance, insurance verification, pre-authorization, and appointment setting. He is known for delivering exceptional customer service, which has resulted in consistently high levels of customer satisfaction.
One of George's greatest strengths is his ability to provide exceptional customer service, consistently exceeding customer expectations and ensuring high levels of customer satisfaction. He is skilled in quickly identifying and resolving issues, effectively communicating with customers, and ensuring that all customer needs are met.
Kenji Lu Mori
Office Administrative Assistant
Kenji Lu Mori, a graduate of BS Psychology with a license as a registered psychometrician, has spent nearly three years honing his skills as a Virtual Assistant. He has provided adept support to professionals like nurses and psychotherapists.
Notably, Kenji served as a Customer Care Specialist. In this role, he managed patient inquiries, handling everything from the availability of in-house doctors to questions about laboratory tests and result timelines, both over the phone and in person.
Additionally, he facilitated healthcare insurance approvals, ensuring seamless processes for patient appointments and result consultations with the medical team, whether for individual patients or corporate clients. Kenji brings a comprehensive skill set tailored for offshore tasks. He deeply understands the dynamics of patient-provider interactions and the significance of fostering strong doctor-patient relationships, which he believes are essential assets in any professional setting.
Certified Healthcare Virtual Assistant
Dema Bitar
Psychiatric Mental Health Nurse Practitioner (PMHNP-BC)
Dema Bitar is a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) with a Master's degree in Nursing Science from the University of California, Irvine, and a Certificate in Psychiatric Mental Health from Western University of Health Sciences.
Dema has extensive experience in both inpatient and outpatient psychiatric settings, where she provides compassionate care tailored to each patient’s unique needs. She is skilled in conducting comprehensive psychiatric evaluations, developing personalized treatment plans, and utilizing evidence-based therapies to support mental wellness. Committed to evidence-based practice, Dema is dedicated to improving patient outcomes through individualized care and a holistic approach to mental health.
In addition to her clinical expertise, Dema is devoted to lifelong learning and professional development. She regularly engages in continuing education to stay current with the latest advancements in psychiatric care. This commitment ensures that her patients receive the most effective and innovative treatments available.
With fluency in English and Arabic, Dema is keen to delivering culturally sensitive care to a diverse patient population. Her goal is to empower her patients to achieve their mental health goals and improve their overall quality of life.
In her free time, Dema enjoys spending time with her family, traveling and trying different restaurants.
(English and Arabic)
Alexandra Cao
Psychiatric Mental Health Nurse Practitioner (PMHNP-BC)
Alexandra Cao is a compassionate, board-certified Psychiatric Mental Health Nurse Practitioner dedicated to providing holistic and patient-centered care. She graduated California State University Long Beach in 2019 with her Bachelor of Science in Nursing. Then, she earned her Master of Science in Nursing Education from California State University Fullerton. Afterwards, she received her PMHNP certificate from California State University Los Angeles.
She has five years of experience in inpatient behavioral health services, providing care to individuals across the lifespan. With a strong foundation in mental health nursing, she is committed to helping individuals achieve emotional well-being and resilience. She has developed a deep understanding of diverse mental health conditions, including ADHD, anxiety, depression, bipolar disorder, and schizophrenia spectrum disorders. Her comprehensive approach integrates therapeutic techniques, medication management, and patient education to support each person’s individualized journey toward healing.
Alexandra is excited to partner with individuals seeking support on their mental health journeys. She is dedicated to making a positive impact in the lives of her patients and looks forward to building meaningful connections.
Alecia DeAngelis
Psychiatric Mental Health Nurse Practitioner (PMHNP-BC)
Alecia DeAngelis is a board-certified Psychiatric Nurse Practitioner with a patient-centered approach to care. She is a new resident to CA and obtained my PMHNP at Maryville University.
With years of experience across various levels of mental health, she offers a unique perspective on treatment, tailoring my approach to meet the individual needs of each client. She is dedicated to helping clients achieve their personal goals, while also building coping skills and resilience. She believes in working closely with my patients, encouraging them to be active participants in their treatment.
By collaborating together, finds her patients the best solutions that truly work for them, leading to more meaningful outcomes. Alecia’s role is to support and guide patients on their journey toward better mental health and overall well-being.Her goal is to empower patients in their decision-making process and strengthen their ability to manage challenges or mental health conditions.
She focuses on creating a compassionate and empathetic environment where patients feel heard and understood.
Sessions with Alecia are designed to leave clients with practical, actionable steps that will help them make the behavioral and mental health changes they need to thrive.
Esmeralda Lopez
Psychiatric Mental Health Nurse Practitioner (PMHNP-BC)
Esmeralda López is a Board Certified, licensed Psychiatric Nurse Practitioner who was born and raised in Santa Ana, CA. Esmeralda obtained her Bachelor of Science in Nursing at the University of Rochester in New York and later pursued her Master's in Nursing at Western University of Health Sciences in Pomona. Prior to obtaining her BS in Nursing, she attended UC Riverside and focused her studies in Psychology and Neuroscience which paved her career.
During her 7 year nursing trajectory, she largely focused on community and public health, with an emphasis on identifying obstacles and the impact social determinants have on people’s well being. Her passion led her to work with underserved and marginalized communities, resulting in rendering care in outpatient settings, such as Skid Row and primary care offices.
As a new grad, Esmeralda intends to support and facilitate patient care, while sustaining patient’s desires and motives for self improvement. Esmeralda is a strong proponent that autonomy and patient education are vital pillars in compliance in care. Esmeralda is looking forward to working with her patients and learning alongside them.
Esmeralda has several hobbies that encourage positive mental health. Spending Saturday mornings at a new coffee shop with her husband, daughter, and her Schnauzer, Mozart, is one of her favorite pastimes. She enjoys practicing her Italian, visiting Disneyland, and traveling.
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