Hala Mouneimne, DO

Dr. Juliet Nichols has been a diplomate of the American Board of Psychiatry and Neurology since 2002 and has been practicing psychiatry for over 25 years. While an expert in psychopharmacology, Dr. Nichols has an integrative approach to treatment and she often incorporates psychotherapeutic techniques when appropriate, tailoring every treatment to each patient's individual needs. She completed her Psychiatry residency at Stony Brook-SUNY and Geriatric Psychiatry Fellowship at the Albert Einstein School of Medicine. Over the last two decades, Dr. Nichols served as an attending psychiatrist at JT Mather Hospital in Port Jefferson, NY, where she became proficient in delivering stellar psychiatric care in a variety of settings. She specializes in treating adult and geriatric mental illnesses, including: Depression, Anxiety Disorders (eg, OCD, Panic Disorder, GAD, PTSD), ADHD, and Cognitive Disorders in the elderly. Dr. Nichols strives to help her patients gain insights into their inner conflicts, unveil their strengths, accept their limitations, and build their coping skills. Her approach is dynamic, straightforward, and empathic so patients always feel safe, understood, and at ease. She engages the patient to be an active participant in treatment decision-making, creating a strong therapeutic alliance.‍

Serena Mirchandani is a board-certified psychiatric nurse practitioner with extensive experience treating serious mental illnesses such as bipolar disorder and schizophrenia spectrum disorders. She also provides care for individuals with depression, anxiety, PTSD, OCD, autism spectrum disorder, and substance use disorders. Serena earned both a Master of Science in Nursing and a Doctorate in Nursing Practice in psychiatry from Columbia University. She completed a Nurse Practitioner Fellowship at Community Healthcare Network and worked at Bellevue Hospital for 2.5 years, providing care on an inpatient psychiatric unit for a diverse, underserved population.

Serena’s approach is grounded in open communication, evidence-based care, and deep respect for each patient’s lived experience. She prioritizes a collaborative, safe space where individuals feel heard, respected, and empowered. Her holistic style supports honest conversation, transparency in treatment options, and patient-centered goals.

Serena begins with a comprehensive assessment to understand each patient's full story—biological, psychological, and social. She then partners with patients to develop personalized, evidence-based treatment plans that align with their values and goals. She emphasizes education, transparency, and regular follow-up to support ongoing progress and informed decision-making.

Rebecca Kostopoulos, PMHNP, is a board-certified psychiatric nurse practitioner committed to helping individuals facing mental health challenges lead full and balanced lives.

Her practice primarily focuses on medication management, often combined with supportive or emotionally focused therapy during 30-minute follow-up visits. When appropriate, Rebecca may recommend involving an additional therapist to ensure the most effective and comprehensive care.

She earned her Master of Science in Nursing with a specialization in psychiatry from Columbia University and her Bachelor of Science in Nursing from Boston College. Her training includes psychiatric diagnosis, medication management, and both psychodynamic and cognitive-behavioral therapies.

With over a decade of experience, Rebecca has evaluated and treated adults in a variety of clinical settings. Her previous roles include working at Elmhurst Hospital’s Comprehensive Psychiatric Emergency Program, Gracie Square Hospital’s inpatient unit, as well as in community health centers and skilled nursing facilities.

As a nurse practitioner, Rebecca believes that mental health is just as vital as physical health. She values the therapeutic relationship and approaches treatment with empathy and collaboration, ensuring that each patient receives personalized and compassionate care.

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Edmund Clark, MD, serves as Chief Psychiatrist at Talkiatry with over 17 years of board-certified experience, including more than 5 years delivering tele-psychiatric care to underserved areas. His career spans 23 years in public service, including leadership roles as Chief of the VA Mental Health Clinics in Jacksonville, FL, and program manager for the University of Florida’s Psychiatry Residency Training Program. A former U.S. Navy psychiatrist, he deployed multiple times, including to Iraq in support of an Army Combat Stress Control clinic, gaining expertise in evidence-based PTSD treatments. Dr. Clark earned his medical degree from the University of Florida and completed his psychiatry residency at the National Naval Medical Center and Walter Reed, serving as chief resident for over 50 military trainees. Before medicine, he served in the U.S. Peace Corps in Kenya.

Dr. Clark values a collaborative approach built on honesty, rapport, and ensuring patients feel heard. He helps patients identify and address multiple factors influencing their mental health, aiming for positive, lasting changes that improve function across life domains. He encourages evidence-based therapies and, when needed, involves other providers to support comprehensive care.

Dr. Clark uses measurement-based tools to assess medication efficacy and guide treatment decisions. He integrates supportive psychotherapy to strengthen coping skills and reduce negative thinking, while incorporating motivational interviewing techniques to promote recovery and self-improvement.

Dr. Shafi completed his undergraduate studies in biology at the University of Nevada Las Vegas. He then earned his medical degree from Touro University Nevada College of Osteopathic Medicine. He went on to complete his psychiatry residency at the Kirk Kerkorian School of Medicine at UNLV, where he was awarded “Master of the PRITE” for achieving the highest score on the Psychiatry Resident In-Training Examination.

Dr. Shafi specializes in the treatment of various psychiatric conditions including anxiety, depression, bipolar disorder, ADHD, and PTSD. He has practiced in multiple settings including inpatient psychiatric facilities, outpatient mental health clinics, and the VA system.  

Dr. Shafi primarily focuses on medication management in conjunction with supportive psychotherapy. Using a collaborative and patient-centered approach, he provides personalized care by tailoring treatment to his patients’ unique needs. Dr. Shafi’s curiosity and compassionate nature allow him to connect with patients from all walks of life. He is committed to creating a supportive environment where patients feel comfortable expressing their mental health concerns.

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Dr. Kathryn Bertacchi is board-certified in both adult and child & adolescent psychiatry. Originally from California, she earned her medical degree from University College Cork in Ireland and completed residency and fellowship at Emory University. She has practiced in varied settings, including developing specialized clinics in eating disorders and gender-affirming care. She is a member of several professional organizations including AACAP, APA, and WPATH.

Dr. Bertacchi fosters an inclusive, nonjudgmental environment where patients feel safe to be themselves. She approaches care with curiosity, compassion, and deep respect for each person’s unique story, aiming to help individuals feel genuinely heard and supported throughout their treatment journey.

In early sessions, Dr. Bertacchi works collaboratively to understand patients' lives, goals, and challenges. While her focus is medication management, she integrates cognitive-behavioral, humanistic, and supportive techniques. She may recommend additional therapy as needed and particularly values working with youth and adults from diverse backgrounds.