Michele Kerbow, MD

Jennifer Hewitt is a board-certified psychiatric nurse practitioner, credentialed through the American Nurses Credentialing Center (ANCC). She earned her master’s degree in nursing from Gonzaga University and has extensive experience treating a wide range of mental health conditions, including anxiety, depression, obsessive-compulsive disorder (OCD), bipolar disorder, schizophrenia, and post-traumatic stress disorder (PTSD).

Her passion for psychiatry and dedication to patient care are rooted in her background as an emergency room nurse and her experience in emergency medical services (EMS). This foundation has given her a unique perspective on the critical role mental health plays in overall well-being.

Jennifer provides compassionate care to adults, children, and adolescents, recognizing that each individual’s path to mental wellness is unique. She believes that while medication can be an important part of treatment, self-care and therapy are equally essential components of a holistic approach.

She is known for her empathetic listening and genuine connection with patients. Through collaboration, she helps individuals set realistic goals and empowers them to take an active role in their recovery. Her kindness and commitment create a supportive environment where patients can thrive on their journey toward mental wellness

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Dr. Yacoub received his medical degree from Alexandria University and completed his psychiatry residency at Stony Brook University Hospital. He is double board certified in both general adult psychiatry and consultation & liaison psychiatry with over 20 years of clinical experience. After serving as chief resident, he joined Stony Brook University and became Associate Professor in clinical psychiatry. During his tenure at Stony Brook, Dr. Yacoub was director of the ECT service treating many patients with complex psychiatric disorders, which include treatment-resistant depression, severe bipolar disorders, psychotic disorders, anxiety disorders, obsessive compulsive disorder, and post traumatic stress disorder. He also served as director of the medical student psychiatry clerkship where he received numerous teaching awards like Alpha Omega Alpha and Aesculapius Award for Excellence in Medical Education. Dr. Yacoub is an excellent diagnostician with expertise in complex mood disorders, psychotic disorders, interventional psychiatry, and advanced psychopharmacology. He has multiple publications and abstracts presented. Dr. Yacoub focuses on the interconnectivity of the mind, body, and soul. His care is only exceeded by his vast medical knowledge. In addition to medication management, he is proficient in supportive and interpersonal psychotherapy. He has treated adults, geriatric patients, and diverse populations including but not limited to LGBTQ+ and veterans. He is dedicated and empathetic to all his patients.

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.

Roel Sepulveda is a board-certified psychiatric mental health nurse practitioner (PMHNP-BC) with a Master of Science in Nursing from the University of Alabama at Birmingham. Certified by the American Nurses Credentialing Center (ANCC), he has over 10 years of experience providing mental health care in psychiatric emergency rooms, outpatient psychiatry, and telehealth settings. Roel is committed to delivering comprehensive and accessible care that supports patients across diverse needs and backgrounds.

As a provider, Roel values creating a compassionate and collaborative environment where patients feel comfortable sharing their experiences. He takes a patient-centered approach, meeting individuals where they are and working together to identify treatment goals. Patients can expect a nonjudgmental space where their concerns are heard, respected, and addressed with empathy and understanding.

When working with patients, Roel begins by taking time to understand their history, symptoms, and current challenges. He develops individualized treatment plans that may include a combination of medication management, lifestyle strategies, and coordination with therapy or other supports. His goal is to provide evidence-based care while empowering patients to actively participate in their mental health journey and achieve lasting well-being.

*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. Jen Wygant is a board-certified psychiatrist who specializes in adult psychiatry. She completed her residency training in general adult psychiatry at the University of Michigan and received her medical degree from Rocky Vista University College of Osteopathic Medicine. However, she took a non-traditional path to medical school. She earned her undergraduate degree in nursing at Northern Michigan University where she also did Army ROTC and competed on their cross-country ski team. After graduation, she went on to work as a nurse in the Army and compete on the US National Biathlon Team.

During her training, Dr. Wygant gained extensive experience treating a wide range of diagnoses with particular emphasis on PTSD, anxiety and depression in diverse populations, including college students, LGBTQIA+ individuals, perinatal individuals, Veterans and those with socioeconomic disadvantages.

Through her work as an Army nurse, lifestyle as an elite level athlete, and training as an Osteopathic physician she has developed a holistic and compassionate approach to providing care as well as an understanding of challenges unique to athletes and Service members. She integrates multiple types of therapy into her medication management appointments and collaborates with patients to form an individualized and empowering care plan that aligns with their goals and priorities.  

Dr. Wygant looks forward to working with you!