Alexandra Baluna, MD

Dr. Samuel Russell is a psychiatrist at Talkiatry. He is board certified in Addiction Psychiatry and Adult Psychiatry. His particular clinical focus is on the treatment of Obsessive Compulsive Disorder, and behavior addictions, as well as trauma, mood, and anxiety disorders. Dr. Russell's practice focuses on evidence-based treatments for psychiatric illness that utilizes a combination of medications and psychotherapy modalities best suited for an individual patient and their needs. He offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. Weekly hour-long psychotherapy may be available if indicated. However, occasionally, Dr. Russell may believe that different therapies are also needed and ask that you bring a therapist into your care team to provide the best outcome. He received his medical education at the University of Washington in Seattle after completing undergraduate studies in psychology and later a post-baccalaureate at Boston University. After residency at the University of Chicago where he specialized in addiction psychiatry and psychotherapy, he completed an Addiction Psychiatry Fellowship at the University of Washington in Seattle.

Dr. Sheena Dohar is a board certified general psychiatrist. Before joining Talkiatry, she practiced extensively in community mental health with adults of all ages in both outpatient and inpatient settings and as the medical director of several intensive outpatient and dialectical behavioral therapy (DBT) based programs. She has experience in private practice and in the dual diagnoses of mental health and substance abuse disorders. Dr. Dohar graduated from Carnegie Mellon University with a Bachelor of Science in Biology and Psychology and then completed medical school at West Virginia University School of Medicine. She trained during her residency at WVU, where she served as a chief resident and received the Brandon K. Fuller Award for Physician Empathy in 2017. Dr. Dohar's practice focuses on medication management. Her goals include helping people feel comfortable seeking treatment as well as promoting an understanding of the purpose and reasoning behind the use of various medications to treat psychiatric disorders. Typically, she offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. When Dr. Dohar may believe that additional therapy is also needed, she will ask that you bring a therapist into your care team to provide the best outcome. Dr. Dohar appreciates and values working with therapists within the Talkiatry practice and in the community in a collaborative effort to promote wellness. She strives to build strong therapeutic relationships with the people that she sees in her practice. Her passions include working in the community at large to encourage a better understanding of mental health disorders and to promote suicide awareness and prevention. She has interests in pharmacogenomics as well as treatment resistant approaches to depression. Dr. Dohar appears in several professional publications.‍

Dr. Bellavia is an experienced board-certified psychiatrist who specializes in adult psychiatry. He was a faculty member of the University of Washington School of Medicine in Seattle for 8 years and has been a medical director and attending psychiatrist in several clinical settings including academic medical centers, outpatient private practice and consultation. Dr Bellavia works collaboratively with each patient to identify presenting problems and stressors and utilizes evidence-based medication treatments along with individualized supportive and short-term psychotherapy strategies to reduce symptoms and improve function. If clinically indicated, he may recommend adding a psychotherapist to your care team. Dr. Bellavia has a particular interest in treating psychiatric conditions including, but not limited to, depression and bipolar disorders, ADHD, anxiety disorders, and adjustment problems. He has extensive experience working with individuals from diverse backgrounds, such as university students, creative and tech professionals, and expat communities. He uses a relaxed, nonjudgmental, empathic approach that is holistic and considers the biological, psychological, social, and cultural factors that impact mental well-being.

Dr. Stacey DiMartino is a board-certified psychiatrist with over 20 years of experience. She received her undergraduate education at the University of Rochester and her medical degree from the State University of New York at Buffalo, where she also completed her residency.

Her approach is individualized and focuses on collaborative care with shared decision-making. Dr. DiMartino specializes in the treatment of adults with a wide range of mental health concerns, including posttraumatic stress disorder, depressive disorders, anxiety disorders, and bipolar disorders. She has enjoyed working with veterans for over 19 years at the VA Healthcare System.

Her style of practice incorporates medication management and supportive psychotherapy with an emphasis on whole health wellness. She will provide a thorough assessment of your mental health needs and formulate a comprehensive treatment plan. She assists with bolstering insight, enhancing intrinsic coping skills, and attaining life goals. Dr. DiMartino enjoys spending time with family, including her rescue dogs, who may sometimes make a special guest appearance during appointments. She looks forward to meeting with you and working together on achieving a fulfilling, well-balanced life.

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Dr. Natalie Cummings is a board-certified adult psychiatrist, and board-eligible geriatric psychiatrist. She obtained her medical degree from the University of North Carolina at Chapel Hill, and completed her residency training in psychiatry at the University of Miami Miller School of Medicine and Jackson Memorial Hospital. She then went on to complete her geriatric psychiatry fellowship at Icahn School of Medicine at Mount Sinai Beth Israel. During her fellowship, Dr. Cummings participated in Mount Sinai's Visiting Doctors Program, providing patient-centered and compassionate care to homebound elder adults in New York City. She also received training at Coler Rehabilitation and Nursing Care Center on Roosevelt Island during her fellowship, and presented at the American Association for Geriatric Psychiatry annual meeting. During her training, Dr. Cummings gained extensive experience providing psychiatric care to various patient populations in multiple patient care settings, including in the outpatient clinic, inpatient unit, and emergency department. Following her training, Dr. Cummings worked at New York Presbyterian's Gracie Square Hospital, serving first in the position of float psychiatrist, providing care to patients on every inpatient psychiatric unit (including the young adult/college student program, Orthodox Jewish program, psychotic disorders program, crisis-stabilization program, dual focus program, and Asian Psychiatry program), before transitioning to an established psychiatric attending for the older adult program. During her time at Gracie Square Hospital, Dr. Cummings received the Physician of the Year Award, and served as a Clinical Assistant Professor of Psychiatry at Weill Cornell Medicine. She worked closely alongside staff psychologist, social workers and nurses to provide multidisciplinary, collaborative care to patients suffering from a variety of mental health conditions. Dr. Cummings primarily focuses on medication management and supportive psychotherapy, but has extensive training in utilizing various therapy modalities, including cognitive behavioral therapy, interpersonal therapy, reminiscence therapy, and psychodynamic psychotherapy. When appropriate, Dr. Cummings will refer for more extensive psychotherapy and/or collaborate with your established psychotherapist for comprehensive care. Dr. Cummings strongly believes that addressing psychosocial and interpersonal factors (including relationship health, economic stressors, social isolation and loneliness) is as essential as pharmacologic management in treating mental health conditions. She has particular experience and interest in treating older adults and those suffering from memory disorders, but provides treatment for a variety of psychiatric conditions including depression, anxiety, bipolar disorder, obsessive-compulsive disorders, trauma-related disorders and substance use disorders. Dr. Cummings is a member of the American Psychiatric Association and American Association for Geriatric Psychiatry.

Margaret Ngumi, MSN, APRN, FNP-C, PMHNP-BC, is a dual board-certified Psychiatric Mental Health and Family Nurse Practitioner with over 20 years of experience in healthcare. She began her career as a Family Nurse Practitioner and later pursued a post-master’s certification in psychiatry to address the growing need for accessible mental health services. Margaret has extensive experience in both inpatient and outpatient settings, treating conditions such as depression, anxiety, PTSD, mood disorders, and substance use disorders.

She takes a collaborative, patient-centered approach to care, creating a safe and supportive environment where individuals feel heard and empowered. With a strong emphasis on holistic care, Margaret considers all aspects of a patient’s well-being—including lifestyle, relationships, and overall health. Whether through medication management, therapy, or lifestyle modifications, she is committed to helping patients achieve meaningful and lasting improvements in their mental health.

Margaret begins with a comprehensive psychiatric evaluation to understand each patient’s history, concerns, and goals. She then works closely with them to develop a personalized care plan that may include medication, therapy, and evidence-based lifestyle interventions. She prioritizes open communication, patient education, and ongoing collaboration to ensure treatment remains effective and evolves with each patient’s needs. Through her compassionate and evidence-based approach, Margaret is dedicated to helping individuals find balance and improve their overall quality of life.

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