Gregory Miller, DO

Background and credentials

Dr. Sinner is board-certified in Psychiatry. He completed his psychiatry residency training at Dartmouth-Hitchcock Medical Center. With over 14 years of experience, he has worked in a variety of settings, including five years in inpatient psychiatry in Vermont, where he served as Medical Director for a state hospital psychiatric unit and taught medical students. He then spent five years working in an outpatient community mental health center in Pennsylvania before transitioning to telepsychiatry, providing care to individuals in Pennsylvania, Florida, and New York.

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Treatment approach

Dr. Sinner employs a collaborative, patient-centered approach, tailoring treatment plans to meet each individual's specific needs. His practice integrates pharmacotherapy with cognitive behavioral therapy (CBT) and supportive therapy as needed. He specializes in treating a wide range of psychiatric conditions, including depression, bipolar disorder, anxiety, ADHD, neuropsychiatric disorders, developmental disorders, and personality disorders. His philosophy is to provide personalized care that makes a meaningful impact at different stages of a patient’s life.

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What you can expect in a first visit

During the first visit, patients can expect a comprehensive evaluation focused on understanding their mental health concerns, history, and treatment goals. Dr. Sinner takes a compassionate and collaborative approach, working closely with patients to create individualized treatment plans. He ensures that each patient receives a balanced and effective combination of medication management and therapeutic interventions suited to their unique needs.

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Why Talkiatry?

We’re a virtual mental health practice that makes it easy to find great care. We combine quality and convenience to help you thrive—faster. Our providers, like this one, are highly trained experts who specialize in medication management and collaborate with you on a treatment plan that fits your needs and comfort level.

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Dr. Sadiq Mirza earned his medical degree from Western University of Health Sciences in Pomona, California, and completed his psychiatry residency in San Bernardino, California. He has experience in both inpatient and outpatient psychiatry, and for the past five years, he has worked extensively in telepsychiatry, helping patients across a variety of care settings.

New patients can expect a collaborative, patient-centered approach grounded in open communication and mutual respect. Dr. Mirza prioritizes creating a warm and supportive environment where care is personalized to meet individual needs. His style empowers patients to take an active role in their mental health journey through informed decisions and compassionate treatment.

Dr. Mirza begins by thoroughly understanding each patient's unique history and goals during the initial session. This sets the foundation for trust and transparency. Together, they create tailored treatment plans with clear, achievable objectives. Ongoing follow-ups ensure progress is tracked, adjustments are made when necessary, and care remains responsive and effective.

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Dr. Ye Kyung Song is a board-certified psychiatrist with both an M.D. and a Ph.D. in medical humanities and ethics from the University of Texas Medical Branch. She completed her residency at Duke University and has experience practicing in both outpatient and inpatient settings. In addition to her clinical training, Dr. Song has pursued advanced training in several therapeutic modalities, including the Collaborative Approach to Management of Suicidality (CAMS) and Radically Open Dialectical Behavioral Therapy (RO-DBT).

Dr. Song takes a collaborative, values-driven approach to treatment, emphasizing partnership in decision-making and tailoring care to each individual’s needs. She uses medication thoughtfully and only when appropriate, considering the whole picture of a patient’s health and life. Her goal is to help patients understand the underlying reasons for their symptoms by examining patterns, conflicts, and meaning. She is committed to creating a safe and supportive environment where patients can explore their experiences openly.

During the initial appointment, Dr. Song focuses on understanding a patient’s clinical history, current concerns, and personal goals. Together with the patient, she develops an individualized treatment plan that clearly outlines areas of focus and aligns with the patient’s values and objectives. Her process emphasizes getting to the root “why” behind symptoms, while using evidence-based medicine and therapy modalities best suited for the situation. Treatment plans and medications are adjusted collaboratively over time to ensure ongoing support and progress.

Dr. Albert Fernandez is a board-certified physician who specializes in adult psychiatry. He has expertise in medication management and psychotherapy. His practice emphasizes a holistic approach to treatment and his style is empathic, insight-oriented, and flexible. He has particular interests in helping individuals struggling with depression, difficulty functioning at work or school, life transitions, bipolar spectrum disorders, ADHD, obsessive-compulsive disorders, relationship struggles, anxiety disorders, sleep disturbances, low self-esteem, and more. He received his bachelor's degree in psychology from Princeton University with a certificate in neuroscience. He earned his M.D. from Renaissance School of Medicine at Stony Brook University and completed his residency training in psychiatry at the Mount Sinai Morningside and West Hospitals. He has supervised junior residents and medical students. He also worked as a staff psychiatrist at Fordham University and published a review article on the effects of residential relocation on mental health. He is currently a Post-Doctoral Candidate in the Adult Analytic Training Program at the New York Psychoanalytic Society and Institute.

Dr. Megan Marumoto provides holistic and personalized care as an integrative psychiatrist board-certified in General Psychiatry, Child & Adolescent Psychiatry, Integrative Medicine, and Lifestyle Medicine. She takes a root cause approach to treating mental health conditions as a certified Functional Medicine practitioner. Dr. Marumoto treats a wide range of mental health conditions in children, adolescents, and young adults, including ADHD, anxiety, depression, phobias, OCD, and trauma-related conditions. Patients may expect a comprehensive assessment with evidence-based treatment focusing on nutrition and healthy lifestyle interventions as well as medication management in 20�30-minute sessions. She enjoys working collaboratively with therapists and health coaches to achieve the best outcomes. She also provides supportive therapy and other therapies when indicated. She received her medical degree from the John A Burns School of Medicine and completed her Psychiatry Residency and Child & Adolescent Psychiatry fellowship at the University of Hawaii. Wishing to provide comprehensive care beyond medication management and therapy, Dr. Marumoto completed a second fellowship in Integrative Medicine at the University of Arizona. She has over 20 years of clinical experience working with military and civilian populations.

Dr. Shelley Sellinger is a board-certified psychiatrist who has been in practice for 25 years. Her career has been devoted to serving both her local community as well as high-risk and underserved patients. As a pioneer and advocate for the use of telepsychiatry years prior to the pandemic, she has presented at the American Telehealth conference as well as at grand rounds. Dr. Sellinger's practice focuses on medication management as well as supportive and insight-oriented psychotherapy. She believes that a combination of therapy, as well as the use of medications, helps provide a patient with the best outcome. Her goal is to help patients live their best and most fulfilling lives. In addition to general psychiatry, she has a keen interest in mood disorders, helping creatives achieve their goals and the LGBTQ community.‍