Tanvi Gupta, DO

*THIS PROVIDER CANNOT PRESCRIBE CONTROLLED SUBSTANCES FOR NH PATIENTS* Doctor Phillip Sullivan is a staff psychiatrist at Talkiatry. He is board certified in both adult psychiatry and child and adolescent psychiatry. His interest in psychiatric treatment was originally triggered by the humanistic writings of Abraham Maslow, Carl Rogers, and Rollo May. As he earned his medical degree and started post-graduate psychiatric training, he went on to learn psycho-pharmacological, cognitive-behavioral, and psychodynamic treatment approaches. He combines these perspectives in diagnosing and treating psychiatric conditions including depression, bipolar spectrum disorders, anxiety, stress and trauma related disorders, adjustment problems, maternal mental health, OCD, ADHD and other disorders. His practice focuses on supportive pharmacological treatment, and he sees listening and empathy as essential elements of the treatment process. He strives to provide a comfortable experience in which doctor and patient work together to understand the presenting problems, develop a treatment plan, reduce symptoms, and optimize functioning. Doctor Sullivan supports and encourages concurrent psychotherapy and will work collaboratively with therapists to optimize the best treatment results. Doctor Sullivan received his MD degree from Brown University Alpert School of Medicine. After completing a medical-surgical internship, he went on to a residency in adult psychiatry and a fellowship in child and adolescent psychiatry at Harvard Medical School's Massachusetts Mental Health Center. He has held academic appointments at Harvard Medical School and the University of New England School of Osteopathic Medicine. In the 36 years following completion of his training, he has worked as the medical director of a mental health center on the under-served Eastern Shore of Maryland, as the medical director of a child and adolescent psychiatric inpatient unit, as a staff psychiatrist at New Hampshire's Dartmouth Hitchcock Clinic, and as the medical director of child and adolescent psychiatric services at Concord New Hampshire's mental health center. Before joining Talkiatry, he served for 18 years as the chief of psychiatry at Southern New Hampshire Medical Center where he also spent three years as the hospital's chief of staff.

Dr. Seth Flesher is double board-certified in adult psychiatry and addiction medicine.  Dr. Flesher’s practice focuses on medication management of psychiatric illness without the use of controlled substances.  Typically, he offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. However, occasionally Dr. Flesher may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome.

Before joining Talkiatry Dr. Flesher was Medical Director of Advanced Psychiatric Services [complex/high profile cases] at Kings County Hospital and Unit Chief of the Covid19 positive unit.  He was also a clinical professor at Downstate Medical College where he was voted educator of the year numerous times by psychiatric residents and medical students.  Dr. Flesher is a graduate of the prestigious combined 6-year BS/MD program at The Sophie Davis School of Biomedical Education.  He did research at the neuropsychiatric branch of the National Institute of Mental Health, completed his psychiatric residency at St. Lukes/Roosevelt Hospital, and he received his master’s degree in public health from Columbia University.

Dr. Flesher believes that psychiatry should start with a thorough assessment to arrive at an accurate diagnosis.  Then a discussion with the patient of the different evidence-based options available.  Followed by shared decision-making to arrive at an effective treatment plan to achieve the goals that the patient identifies as being important.  This should be done in an honest, open, non-judgmental, but realistic environment.  Understanding that the ultimate goal is to get the patient to a position where they will no longer need medication and/or therapy.

Dr. Stansberry holds the position of staff psychiatrist at Talkiatry. He is board-certified in Adult Psychiatry by the American Board of Psychiatry and Neurology. Stansberry's practice focuses on medication management and also incorporates supportive therapy techniques, typically in 30-minute follow-up visits. In some cases, Dr. Stansberry may believe that additional therapy is also needed and ask that you bring a therapist into your care team. Dr. Stansberry received his medical degree from the Louisiana State University Health Sciences Center in New Orleans. He completed his residency training through the Louisiana State University/Ochsner Health Foundation Psychiatry Residency program. He has experience working in inpatient, emergency, and consult-liaison psychiatry but particularly enjoys the opportunity to work longitudinally with patients in the outpatient setting.**THIS PROVIDER CANNOT PRESCRIBE CONTROLLED SUBSTANCES FOR LOUISIANA PATIENTS**

Dr. Pan is a board-certified psychiatrist with over 10 years of experience. She holds a Doctor of Medicine degree from UT Southwestern Medical School and completed her medical specialty training in the Department of Psychiatry at UT Southwestern Medical Center. She has served as faculty at UT Southwestern, teaching medical students and mentoring psychiatry residents.

Dr. Pan is a diplomate of the American Board of Psychiatry and Neurology. Dr. Pan specializes in medication management for adults with a broad range of psychiatric conditions, including anxiety, bipolar, depression, insomnia, PTSD/trauma-related disorders. Medication treatment may be complemented with elements of supportive psychotherapy, psychodynamic therapy, and cognitive behavioral therapy.

Dr. Pan works collaboratively with patients to develop evidence-based treatment plans tailored to their unique needs. If further psychotherapy is needed, she may recommend working with a therapist as well. Asking for help can be difficult, especially when it comes to mental health. During the first visit, patients can expect a welcoming space where they can share their concerns. The visit will also focus on a psychiatric evaluation covering symptom details, psychiatric and other medical history, prior treatments, and how the current symptoms affect the person as a whole.‍

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Dr. Jennifer Cenker is a board-certified psychiatrist with a strong foundation in science and mental health care. She earned her bachelor’s degree in Biology from John Carroll University, completed a PhD in Molecular Virology at Case Western Reserve University, and received her medical degree from The Ohio State University College of Medicine, where she also completed her Psychiatry Residency. She treats a range of conditions including ADHD, depression, anxiety, OCD, bipolar disorder, and PTSD/trauma.

Dr. Cenker values open communication and a strong therapeutic alliance, creating a supportive and collaborative environment where patients feel heard and respected. She develops individualized treatment plans that typically include both medication management and therapy, guided by evidence-based practices. She also promotes weight-neutral care and emphasizes health-supporting habits.

Dr. Cenker begins with a comprehensive initial appointment focused on understanding each patient’s history and treatment goals. She uses this information to build personalized treatment plans. Follow-up appointments include ongoing medication management and the integration of therapeutic techniques, ensuring care evolves with the patient's needs.

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.