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Dr. Ellen A. Machikawa, MD is a board-certified psychiatrist with 20+ years of experience helping adults manage complex mental health concerns. She provides evidence-based, personalized care in a safe, judgment-free environment. Dr. Machikawa combines expert medication management with supportive psychotherapy to support meaningful, practical progress. She has extensive training in geriatric psychiatry, mood disorders, and complex psychiatric conditions. Her clinical focus includes depression, anxiety disorders, PTSD/trauma, bipolar disorder, obsessive-compulsive disorder (OCD), panic disorder, personality disorders, psychotic disorders, ADHD, and geriatric mental health. She offers flexible and responsive care, including same-day appointments, telehealth sessions, and direct phone consultations when needed. She also uses AI note-taking support so she can focus her full attention on patients during visits. Dr. Machikawa’s approach centers on listening closely, asking thoughtful questions, and building a treatment plan that fits each patient’s needs and goals.

Through active listening and thoughtful questions, I hope to make a difference in each of my patient's lives for the better. Breaking down the stigma of mental healthcare, providing an open-minded nonjudgmental physician-patient relationship, and helping each individual find ways to reach their own goals are passions of mine.

Dr. Brittany Tarrant was born and raised in Baltimore, Maryland to a family who encouraged her to follow her dreams – even if that meant humoring a 5-year-old who exclaimed that she would be a doctor one day. Dr. Tarrant went on to complete her undergraduate degree in Psychology at the University of Maryland, College Park. There, she discovered her love for the human brain and mental health and knew that psychiatry would be a great fit. She completed her master’s degree at Georgetown University and then her Doctor of Medicine degree at Howard University College of Medicine in Washington, D.C. She then set her sights on the sunny skies and warm weather here in Los Angeles and completed her general adult psychiatric training at UCLA. 

Dr. Tarrant is board-certified in Adult Psychiatry and is board-eligible for Child and Adolescent Psychiatry. She trained at UCLA Semel Institute for Neuroscience & Human Behavior and Resnick Neuropsychiatric Hospital, where she completed both her residency and fellowship. Dr. Tarrant is passionate about mental health and treating those who are often overlooked and forgotten in our society. Her clinical interests include treating a wide range of psychopathologies including psychotic and mood disorders, trauma, and special populations including people of color, women, children and young adults, gender and sexual minorities, veterans, and individuals involved in welfare and criminal legal systems. She is dedicated to advancing the field of psychiatry through compassionate, thoughtful, and culturally humble care while working to eliminate barriers to accessing care and de-stigmatizing mental illness.  

Outside of clinical work, Dr. Tarrant is involved in teaching, mentorship, community outreach, and various leadership positions. She is dedicated to creating spaces of healing and inclusion and has been engaged in diversity, equity, and inclusion work at UCLA and beyond. When not at work, you can find her enjoying a relaxing day with family and friends, exploring the local food scene, or traveling near and far.  

Wenqi Feng, MD is a cofounder of Regeneration Psychiatry. She is a board-certified psychiatrist who has extensive experience treating the full scope of mental health disorders and she practices in Redondo Beach, California.

She has a special interest in reproductive psychiatry and women’s mental health and has helped many women navigate their psychiatric care during pregnancy and postpartum. She also has experience treating premenstrual dysphoric disorder (PMDD) and peri-menopausal psychiatric disorders. 

Dr. Feng was born in Nanchang, China, and immigrated with her parents to the United States when she was a child. She attended medical school at Boston University School of Medicine in Boston, Massachusetts, where she discovered her love of connecting with patients and listening to their stories.

She continued her training at the University of California, Los Angeles (UCLA), in Los Angeles, California, completing a general adult psychiatry residency at the Semel Institute for Neuroscience and Human Behavior in Los Angeles, California. 

While there, Dr. Feng trained in highly specialized clinics treating psychotic and mood disorders, anxiety disorders, neurodevelopmental disorders, and addiction.

Dr. Feng is also a clinical instructor at the David Geffen School of Medicine at UCLA and is involved in mental health research at the VA Greater Los Angeles Healthcare System.

When Dr. Feng isn’t with patients, she enjoys traveling, reading, and hiking. She is fluent in English and Mandarin.

 

冯文奇医生，Regeneration Psychiatry精神科医师兼联合创始人、UCLA医学院临床讲师、洛杉矶退伍军人医院（West Los Angeles VA）精神疾病研究员，中英文双语精通。

冯医生出生于中国南昌，6岁时随父母移民至美国定居，在美国波士顿大学求学期间即对心理学以及医学产生了浓厚的兴趣，于是最终选择精神科作为其主攻方向，并于2017年取得了美国波士顿大学医学博士学位。毕业后，冯医生前往美国加利福尼亚大学洛杉矶分校（UCLA）进行精神科住院医生培训。得益于此次宝贵的经验，冯医生在抑郁症、焦虑症、 躁郁症，以及精神分裂症疾病相关的医疗技法得以进一步精进。与此同时，冯医生对产后抑郁症的专业疗法和研究，也帮助了许多孕期及产后心理疾病患者得以康复。

正如救助病患需要专业疗法一样，旅行、阅读和爬山也是冯医生在工作之余用以慰藉心灵的独门秘方，帮助排解压力与疲惫的同时，也让生活得以继续并充满希望。

Dr. Poblete is a board-certified psychiatrist trained in the diagnosis and treatment of the full spectrum of psychiatric and mental health disorders. He is a co-founder of Regeneration Psychiatry and sees patients virtually and in-person at our Redondo Beach, California office. He is also a clinical instructor at UCLA and at Long Beach Memorial, where he teaches and supervises medical/psychiatric residents. 

Dr. Poblete has extensive experience in the management of anxiety disorders, depression, OCD, bipolar disorder, schizophrenia spectrum disorders, borderline personality disorder, ADHD, and addiction. He has a special interest in working with transgender/gender expansive/non-binary individuals, other members of the LGBTQ+ community, and people living with HIV. His clinical practice is grounded in evidence-based medicine and in the biopsychosocial model of health. And his therapeutic approach draws heavily from critical social theory, Cognitive Behavioral Therapy, mindfulness, Acceptance and Commitment Therapy, and Mentalization-Based Therapy. 

Dr. Poblete grew up in Southern California in a Filipino-American immigrant family. He received his undergraduate education at UC Berkeley, where he studied anthropology and urban studies. Prior to going to medical school, he was a community organizer and campaigner working in social/racial justice movements and in the labor movement. He completed his medical education at UCSF, his internship at Harbor-UCLA, and his psychiatric residency at the Semel Institute for Neuroscience and Human Behavior at UCLA.

Outside of his clinical work, Dr. Poblete enjoys travel, the outdoors, art, and soccer. 

Dr. Key was born and raised in Washington, DC. before venturing off the east coast. He received a BA in Human Biology from Stanford University and earned his MD from the Icahn School of Medicine at Mount Sinai. Dr. Key had an early passion of bridging the gap between medicine and communities of color. His love of narrative and ability to connect patients to their personal stories led him to Psychiatry and he continued his training at UCLA’s Semel Neuropsychiatric Institute. He served as the residency’s Co-Chief of Justice, Equity, Diversion, and Inclusion (JEDI) for two consecutive years with the goal of greater equity amongst historically underrepresented peoples. As a resident, he trained in highly specialized clinics treating psychotic and mood disorders, anxiety disorders, addiction, and ADHD. Justin is also a father, husband, and a fiction author.

Dr. Justin Key is Board-Certified in Psychiatry.