Robin Lawson, LCSW

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Paula Bennett, LPC

Staff Licensed Professional Counselor

Paula Bennett, LPC, has been in practice for over 20 years. She specializes in CBT and individual therapy. Paula strives to provide a client-centered approach based on the individual's needs. Paula has a specific passion for victims of trauma. As a teen and young adult, she struggled with depression. There weren't many treatment options at that time, but she found a counselor who inspired her to help others with mental health issues. Outside of work, Paula is known to enjoy reading, swimming, and watching animals, spending time with family, and watching movies. She also loves being able to help people and watch them grow.

Christa DeFries, MD

Staff Psychiatrist

Background and credentials

Dr. Christa DeFries is a board-certified Adult Psychiatrist. She earned her medical degree from UT Southwestern Medical School in Dallas, Texas, and completed her residency in Adult Psychiatry at Baylor Scott & White in Temple, Texas. Following residency, Dr. DeFries gained additional experience treating homeless and formerly homeless populations in New York City, particularly focusing on individuals with histories of trauma and substance addiction, prior to joining Talkiatry.

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Treatment approach

Dr. DeFries practices Adult Psychiatry, employing an integrative treatment approach combining medication management, psychotherapeutic methods, and lifestyle modifications. She recognizes that each patient benefits from a personalized mix of these three aspects of care. Dr. DeFries specializes in treating diverse psychiatric conditions, including those related to trauma, substance addictions, and various mental health disorders.

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What you can expect in a first visit

In a first visit with Dr. DeFries, patients can expect a comprehensive evaluation aimed at understanding their individual mental health history, specific concerns, and overall treatment goals. Dr. DeFries emphasizes an individualized approach, carefully exploring the best combination of medication, therapy, and lifestyle adjustments tailored specifically to each patient's needs. Patients can anticipate an empathetic and collaborative environment focused on their personal experiences and goals.

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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.

Margaret Ngumi, PMHNP

Staff Psychiatrist

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 before recognizing the urgent need for accessible mental health services. This led her to pursue a post-master’s certification in psychiatry, allowing her to provide comprehensive psychiatric care. Margaret has extensive experience treating patients in both inpatient and outpatient settings, addressing conditions such as depression, anxiety, PTSD, mood disorders, and substance use disorders.

Margaret believes in a collaborative, patient-centered approach to mental health care. She strives to create a safe and supportive space where patients feel heard and empowered to take an active role in their treatment. With a strong emphasis on holistic care, she 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 treatment goals. She then works closely with them to develop an individualized care plan that may include medication management, therapy, and evidence-based lifestyle interventions. She prioritizes open communication, patient education, and ongoing collaboration to ensure that treatment remains effective and evolves with each patient's needs. Through her compassionate and evidence-based approach, Margaret is dedicated to helping patients find balance and improve their overall quality of life.

Ellen Grant, LCSW

Staff Licensed Clinical Social Worker

Ellen Grant, LCSW, Eagala Certified, brings extensive experience working with adolescents, adults and families in treating mental health and substance use disorders. Ellen is a graduate of The College of Saint Rose, where she obtained a Bachelor's Degree in Social Work. She is a graduate of Fordham University, where she obtained a Master's Degree in Social Work. She obtained a post-graduate certification in Military Trauma from Adelphi University. Ellen is certified in equine-assisted psychotherapy and is learning through the Eagala model. She has been practicing in the field for 12 years. She believes in a person-centered approach to counseling and specializes in Cognitive Behavioral Therapy, Dialectical Behavioral Therapy, and Motivational Interviewing. She is also certified in Seeking Safety.

Bridgette Hathaway, LCSW

Staff Licensed Clinical Social Worker

Bridgette K. Hathaway, LCSW holds the position of clinical therapist at Talkiatry. She is board-certified in clinical social work. She has been practicing for over 5 years. Ms. Hathaway's practice focuses on individual psychotherapy. Typically, she offers this in conjunction with solution-focused motivational interviewing and cognitive behavioral therapy, in 60-minute visits. She received her bachelor's degree in liberal arts with a focus in behavioral neurobiology and women's studies from Harpur College at Binghamton University, and her master's degree in social work at the College of Community and Public Affairs at Binghamton University. Additionally, Ms. Hathaway studied abroad in Blantyre, Malawi, Africa, completing an Asset-Based Community Development program promoting social-emotional wellbeing for youth. After completing training, she returned and worked in her local community, Binghamton, NY, in myriad roles. First, with adolescents at the Promise Zone Summer Zone Summer Camp as program coordinator, continuing to focus on the wellbeing of youth, before becoming the MICA enhanced residential coordinator for Fairview Recovery Services, where she spent time providing addiction services to the dually diagnosed. She was then the residential treatment center social worker at the Children's Home of Wyoming Conference focused on service provision to adolescent males, before becoming a behavioral health counselor providing integrated mental health and addiction services to individuals of all ages, at Family and Children's Counseling Services. Further, Ms. Hathaway participated in continuing education in LGBTQ, Gender Identity, Expression, and Behavioral Health; OASAS Person-Centered Care and Harm-Reduction; Integrated Mental Health Addictions Treatment; NYSED Safe Schools Against Violence in Education; Borderline Personality Disorder; Integrated Treatment-Individual Interventions; and Motivational Interviewing. Her auxiliary certifications include Child and Adolescent Needs and Strengths Needs Assessments, Therapeutic Crisis Intervention, ASIST-Applied Suicide Intervention Skills, and NYSDOH Opioid Overdose Naloxone Program.‍

Jessica Vassallo, LCSW

Staff Licensed Clinical Social Worker

Jessica Vassallo is a Licensed Clinical Social Worker with extensive experience in the area of mental health. She has worked with patients of various demographics including World Trade Center responders, college students, patients with severe and persistent mental illness, dually diagnosed patients, patients who have or have had cancer, and patients with impoverished backgrounds. She received her Master's Degree at Adelphi University in 2003, became certified that year and received her license in clinical social work in 2008. Jessica has been practicing in social work for 20 years, focusing on anxiety, depression, and PTSD. She uses an eclectic approach in therapy with a foundation in Cognitive Behavioral Therapy, Acceptance and Commitment Therapy, mindfulness therapy, and supportive psychotherapy. She develops an individualized treatment plan for all patients to focus on their goals. She believes that the person is impacted by all the larger systems they are in (family, workplace, community, larger society) and is committed to providing a non-judgmental, warm, and empathetic space to help clients feel understood and comfortable exploring the roots of their issues.

Cheryl Person, MD

Director of Clinical Quality

Dr. Cheryl Person is the National Director of Clinical Quality at Talkiatry. She is board certified in general adult psychiatry and has been in practice for 20 years. Dr. Person focuses on medication management but believes that is only part of successful treatment. She will spend her time providing motivational interviewing or supportive therapy, and believes it is often critical to have a therapist as part of the treatment team. Dr. Person received her medical degree from Tulane University School of Medicine. She completed her psychiatric residency at Johns Hopkins and a psychiatric epidemiology fellowship at Johns Hopkins Bloomberg School of Public Health with a focus on disaster mental health. After relocating to Texas in 2010, she worked as Director of Psychiatric Services of a large safety-net hospital in Houston. Prior to Talkiatry, she most recently was the executive director/chief physician of a large university student health center and campus pharmacy. In addition to adult psychiatry, Dr. Person has worked extensively with victims of acute trauma and her primary focus is on working with patients who have anxiety and mood disorders.

Erica Linnell, MD

Staff Psychiatrist

Dr. Erica Linnell is a board-certified adult psychiatrist. Her practice focuses on medication management and supportive therapy. Dr. Linnell is a graduate of Rutgers Robert Wood Johnson Medical School, from which she graduated with Alpha Omega Alpha honors and earned the Glasgow-Rubin Certificate of Commendation for Academic Achievement Award. Dr. Linnell trained in psychiatry residencies at Brown University/Butler Hospital and at Harvard University/Mass General Hospital. During medical school and residency, Dr. Linnell volunteered in community outreach programs that provided preventive health education and clinical services to homeless and under-served populations, taught elementary school children about the importance of healthy eating and physical activity, and hosted monthly support meetings for adolescents living with chronic diseases and their parents to foster connections and mentorship. Dr. Linnell uses a compassionate, affable treatment style in her practice that specializes in psychopharmacology with conjunctive psychotherapy. She has experience in treating patients with depression, anxiety disorders, PTSD, ADHD, and OCD.

Jenna Hartman, DO

Staff Psychiatrist

Dr. Jenna Hartman is double board certified in General Psychiatry and Addiction Psychiatry. Dr. Hartman graduated from Tufts University before completing medical school at New York Institute of Technology College of Osteopathic Medicine. She then completed residency at Maimonides Medical Center, where she was a Chief Resident, and then pursued an addiction psychiatry fellowship at Mount Sinai Beth Israel. Dr. Hartman was also trained in psychodynamic psychotherapy by the Psychoanalytic Association of NY. Following her training, Dr. Hartman returned to Maimonides Medical Center, where she worked as an attending adult outpatient clinic, treating patients from many different backgrounds with a wide array of diagnoses. She holds a special interest in treating mood disorders, anxiety disorders, and OCD. Dr. Hartman uses a compassionate and thoughtful approach in order to form a collaborative partnership with her patients. She believes in treating the person as a whole and tailoring treatments to each individual's specific needs. Dr. Hartman works with patients in 30 30-minute follow up sessions, where in addition to medication management she provides supportive and at times psychodynamic therapeutic techniques.

Avishay Adri, PMHNP

Staff Psychiatric Nurse Practitioner

Avi Adri is a board-certified psychiatric nurse practitioner with a passion for helping others achieve their goals through medication management and psychotherapy. He is trained in cognitive behavioral therapy, psychodynamic therapy, and supportive therapy. He has experience helping others with depression, anxiety, OCD, bipolar disorder, PTSD and ADHD. He is an LGBTQIA+ affirming provider believing in empowering others in their life. He received his Master of Science in Nursing with a specialty in psychiatry from Stony Brook University and his Doctorate Degree in Nursing Practice from Chatham University. Avi believes in providing evidence-based compassionate treatment for mental health conditions to improve quality of life. His previous experience includes working at Columbia University Medical Center for 2 years on an inpatient psychiatric unit and for four years on the medical consultation liaison psychiatric team treating patients with an array of acute and chronic medical conditions while providing medication management and psychotherapy. His experience at Columbia includes treating an array of psychiatric conditions with the goal of reaching remission of symptoms. Additionally, he has experience practicing at a private practice in New York City focusing on interventional techniques such as TMS and Ketamine while providing medication management and psychotherapy. Through mindful techniques and compassionate care, Avi strives for the well-being of his clients. He believes clients are more than a diagnosis through the lens of client-centered holistic care.

Leah Clary, LPC

Staff Licensed Professional Counselor

Leah E. Clary is a Licensed Professional counselor at Talkiatry. She has years of experience working with individuals of all ages from childhood to older adults. Leah E. Clary utilizes an eclectic counseling style. She understands that each and every person is unique and has individual needs, and is willing to adapt to what would benefit the individual. Leah believes that coordinating with all providers is important to achieving successful therapeutic experiences for the length of the engagement. After receiving her master's degree from Liberty University, Leah participated in an internship in Philadelphia working with first responders for crisis debriefing. While participating in this program, Leah also actively worked as an older adult protective services investigator within the city limits. In order to achieve her goal of becoming an LPC, Leah began working with families in a community-based program focusing on relational components. In this program, Leah worked with therapists of different backgrounds, building on her knowledge of communication techniques and team-based therapy, and even training new team members as needed. Throughout her professional career, Leah has worked with individuals with various diagnosed and undiagnosed conditions and adapted to their individual needs. Her passion is to assist the underserved demographic of individuals working through infertility issues and processing the idea of adoption.

Sumeet Singh, MD

Staff Psychiatrist

Dr. Sumeet Singh is board-certified by the American Board of Psychiatry and Neurology in General Adult Psychiatry. He completed his psychiatry residency training at Howard University Hospital and Saint Elizabeth's Hospital in Washington, DC., where he was voted as Chief resident. He went on to serve as vice chair of the Department of Psychiatry at Adventist HealthCare in Maryland, where he worked in both an administrative and clinical role treating adults in inpatient settings. Additionally, he served as a Clinical Instructor of Psychiatry at Georgetown University School of Medicine, teaching medical students about the art of medicine. Dr. Singh received his undergraduate degree in Neuroscience from the University of Michigan and received his medical degree from Xavier University School of Medicine. Most recently, Dr. Singh worked for Life Stance Health, an outpatient telehealth company, where he treated patients between the ages of 18-65 years old with both medication management and therapeutic interventions. Dr. Singh has years of experience treating the following disorders/diagnoses: depression, anxiety and panic attacks, bipolar disorder, PTSD, ADHD, and OCD.‍

Robin Lawson, LCSW

Education and training

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