Megan Marumoto, MD

Dr. Stephen Geisler is a board-certified adult psychiatrist and has been practicing for over 37 years. His practice focuses on medication management, and typically offers this in conjunction with supportive therapy in 30-minute follow-up visits. If Dr. Geisler feels you would benefit from working with a therapist in conjunction with medication management, he welcomes collaboration with your therapist to make for the best outcome. Dr. Geisler is a graduate of the New York University School of Medicine. He completed a fellowship in Psychoanalytic Psychotherapy at the Zucker Hillside Hospital of Northwell Health after finishing his residency training there. He is currently an Assistant Clinical Professor at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell. Over the years Dr. Geisler has received a number of awards including NAMI Exemplary Psychiatrist Award, The APA Irma Bland Certificate of Excellence in Teaching Residents, the Zucker Hillside Hospital Department of Psychiatry Recognition Award for Education, and twice received the Outstanding Teacher of the Year Award from the graduating residents' class. Dr. Geisler is a member of the American Psychiatric Association, the Nassau Suffolk District Branch of the APA and the American Society of Clinical Psychopharmacology. Through the years, Dr. Geisler has participated in many clinical research projects, has been the co-author of many papers, and has made many presentations. Dr. Geisler specializes in psychopharmacology, especially tailoring individualized treatment to serve the needs of patients with a variety of conditions. He has a lot of experience in treating patients with depression, bipolar disorder, anxiety disorders, ADHD, and OCD.

Dr. Mendez obtained his medical degree from the University of Texas Medical School in Houston. He subsequently completed his Psychiatry residency training at the same institution, UT Medical School in Houston. Dr. Mendez has extensive training in the field and is board certified in Adult Psychiatry by the American Board of Psychiatry and Neurology. After professional training, Dr. Mendez has had vast experience of 15 years primarily in the outpatient setting including ample experience with telemedicine services to patients. He has extensive experience in diagnosing and treating adult patients dealing with attention deficit disorders and a wide spectrum of adjustment and anxiety disorders. Dr. Mendez has a special interest in the treatment of mood disorders from Major Depression to Bipolar spectrum disorders. Dr. Mendez prioritizes the development of great communication, mutual understanding and trust with his patients as he finds these elements to be key to a successful treatment. He establishes his treatment plans upon evidence-based guidelines and encourages a holistic approach for optimal well-being. Through effective medication management and supportive psychotherapy, Dr. Mendez leads his patients to optimal mental health. He encourages patients to strive to develop fulfillment and optimal functionality in their life's roles.

Dr. Dave Kopacz studied psychology, medicine, and psychiatry at the University of Illinois. He has over 25 years of clinical experience, most recently 11 years at the Seattle Veterans Affairs and as a national VA Whole Health Education Champion, teaching holistic self-care to staff and veterans. Prior to that, Dr. Kopacz was Clinical Director of a psychiatric rehabilitation center in New Zealand. He has worked in private practice, rural community mental health, and ran a VA tele-health program for Native American/Alaskan and Pasifika veterans.

Dr. Kopacz is board certified in Psychiatry & Integrative Medicine, a certified yoga instructor and a certified iRest (Integrative Restoration) meditation teacher. He is an author and international speaker on topics of burnout, well-being, medical humanities, creativity and health, and cross-cultural approaches to healing. His books include Caring for Self & Others: Transforming Burnout, Compassion Fatigue, and Soul Loss, and Re-humanizing Medicine. He has also co-authored four books with Joseph Rael (Beautiful Painted Arrow), including Walking the Medicine Wheel: Healing Trauma & PTSD.

"What is your typical process for working with patients?"

Dr. Kopacz combines psychiatric diagnosis with a collaborative and holistic focus on your strengths and personal growth. Combining a psychiatric and self-care assessment, he will help you find a plan for medication, psychotherapy, and well-being work that feels right for you.

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Dr. Bianca Fleming is a double board-certified psychiatrist in Adult and Child and Adolescent Psychiatry. She completed her undergraduate studies at the University of Georgia, earned her MD from Morehouse School of Medicine, completed psychiatry residency at the University of North Carolina at Chapel Hill, and a child and adolescent fellowship at Emory University School of Medicine. She has experience across inpatient, outpatient, and integrative community health settings.

Dr. Fleming values gathering thorough information through a warm, conversational interview style. She strives to create a supportive therapeutic space while maintaining a balanced sense of patient accountability to promote meaningful progress.

Her approach emphasizes shared agenda setting at every visit to ensure both patient and provider needs are met. Dr. Fleming takes a detailed history to guide clinical decisions, prioritizes patient education, and delivers evidence-based, patient-centered care. She integrates psychotherapy into all medication management appointments to support holistic treatment.

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Dr. Desir is a Board-Certified Psychiatrist who completed her undergraduate training at The University of Scranton followed by medical school at the New York Institute of Technology College of Osteopathic Medicine. She completed psychiatry residency at Nassau University Medical Center where she served as the Administrative Chief Resident in her final year. Dr. Desir has been in practice for 4 years and has provided patients with compassionate psychiatric care. She has worked in community mental health settings throughout her career, in which she served a wide variety of patient populations. Dr. Desir is experienced in treating various psychiatric illnesses including mood disorders, anxiety disorders, OCD, PTSD, and ADHD. At the heart of Dr. Desir's clinical approach is a strong emphasis on establishing trust and building a therapeutic relationship. She also provides psychoeducation to help patients make informed decisions regarding their care. She works collaboratively with patients to develop individualized treatment plans to help them achieve their goals. Dr. Desir's practice focuses on medication management. Typically, she offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. Occasionally, Dr. Desir may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. Talkiatry takes medication management seriously. All state-controlled substance databases are reviewed and taken into consideration during your initial evaluation.

Steven Warren, PMHNP, has over 25 years of psychiatric nursing experience in both inpatient and outpatient settings. He has provided extensive individual and group psychotherapy and education, and since 2017, has offered medication management and brief therapy in a collaborative community mental health setting. Steven earned his Bachelor of Nursing in 2011 and Master of Nursing in 2017 from Indiana University, and is ANCC board-certified as a Psychiatric Mental Health Nurse Practitioner.

Steven values open and honest communication, working directly with patients to set clear, achievable treatment goals. He is dedicated to ensuring each person he works with feels heard, respected, and supported throughout their mental health journey. His approach emphasizes collaboration, empathy, and trust.

During the first session, Steven takes time to understand each patient’s history, concerns, and goals. He develops individualized treatment plans that reflect patient values, adapting them as needs evolve. Through a strong therapeutic relationship, he provides guidance and support to help patients achieve meaningful and lasting progress.