John Hendrick, MD

LaTonya Washington, LICSW-S, PIP, is a trauma and couples' therapist with a Master of Social Work from the University of Alabama and advanced training in Brain spotting, Acceptance and Commitment Therapy (ACT), Cognitive Behavioral Therapy (CBT), and the Gottman Method for couples therapy. With over 15 years of experience, she provides compassionate, evidence-based care to individuals and couples navigating trauma, relationship challenges, and major life transitions.

She specializes in helping couples rebuild trust after infidelity, strengthen emotional connection, and improve communication. She also supports individuals facing anxiety, burnout, and the emotional impact of chronic illness, guiding them toward healing and resilience

New clients can expect a warm, supportive space where they feel heard and understood. LaTonya takes a collaborative approach, tailoring therapy to each client’s needs while integrating practical strategies for healing and growth. Her sessions are focused on fostering insight, building emotional resilience, and equipping clients with tools to create lasting change. Whether working with individuals or couples, her goal is to help clients navigate life’s challenges with greater clarity, connection, and confidence.

Zaccaheaus (Zacc) Adams is a licensed clinical counselor in both Maryland and North Carolina. Zacc graduated from the University of North Carolina at Pembroke with his master's in clinical mental health counseling. He has been effective in providing therapy for many presenting concerns such as depression, anxiety, self-esteem/confidence, trauma, career conflicts, and relationship issues. Zacc has extensive experience working with adolescents, adults, couples, friends, and families. He aims to create a warm and inviting environment that will allow clients to further develop growth and empowerment within themselves. Zacc uses an integrative therapeutic approach to meet each client where they are in each session.

***Provider does not prescribe controlled substances*** Dr. David Eiler is a staff psychiatrist at Talkiatry. He is board certified in adult psychiatry. Before joining Talkiatry, Dr. Eiler was a staff psychiatrist at Dartmouth-Hitchcock Medical Center (DHMC), where he had an academic appointment and served as clinical director of transcranial magnetic stimulation (TMS) and intranasal esketamine services. In his practice, Dr. Eiler has focused on medication management and interventional techniques, including TMS, for the treatment of depression and other disorders. Dr. Eiler received his MD from the University of Wisconsin School of Medicine and Public Health and completed his residency at DHMC.

Karen Tonner, MSN, PMHNP-BC is an ANCC board-certified Psychiatric Mental Health Nurse Practitioner with over eight years of experience providing psychiatric care in outpatient and community mental health settings. She works with patients across the lifespan and treats a broad range of mental health conditions, including depression, anxiety disorders, attention-deficit/hyperactivity disorder (ADHD), obsessive-compulsive disorder (OCD), and post-traumatic stress disorder (PTSD).

Karen primarily provides medication management in conjunction with supportive therapy, using evidence-based practices to help patients achieve symptom relief and improved functioning. Her approach to care is holistic, person-centered, and collaborative, emphasizing shared decision-making and individualized treatment planning. She strives to create a welcoming, approachable, and supportive environment where patients feel comfortable being themselves and actively participating in their care. She believes that understanding each patient’s unique experiences, goals, lifestyle, and strengths is essential to effective mental health treatment.

Karen earned her Bachelor of Science in Nursing from Kennesaw State University and her Master of Science in Nursing from the University of Alabama at Birmingham. She is dedicated to continuing education to remain current with psychiatric research and is committed to delivering compassionate, high-quality care that helps patients feel heard, respected, and empowered.

Lance Briggs is a dedicated Psychiatric Nurse Practitioner with over a decade of clinical and leadership experience. A graduate of the University of North Dakota, Lance began as a psychiatric RN in acute inpatient settings before becoming a psychiatric RN supervisor in a major Houston hospital while pursuing advanced practice.

After becoming a PMHNP, Lance initially worked with outpatient addiction treatment and severe mental illness populations, later expanding into bariatric psychiatry to support patients preparing for weight-loss surgery. When the COVID-19 pandemic paused bariatric procedures, Lance founded a private practice—Grey Matters Mental Health—in Seattle, which was later sold to a larger healthcare organization in Minnesota. Lance then transitioned into correctional mental health, serving underserved populations within the criminal justice system. Currently, Lance is working at Talkiatry, providing compassionate, high-quality care informed by experience across diverse and challenging environments.

Lance understands that every patient is unique. His approach is grounded in Carl Rogers’ principle of unconditional positive regard, creating a safe, calming space where patients feel heard and valued. Lance takes time to explore developmental history, family background, and major life events, recognizing how past experiences shape present challenges. He aims to understand each symptom fully and offers thoughtful, collaborative treatment options.

Dr. Olivia Plante is a board-eligible psychiatrist with a focus on evidence-based medicine including psychopharmacology and nutritional psychiatry in the diagnosis and treatment of a wide range of psychiatric disorders.

She is originally from New York, having completed her undergraduate degree in psychology from The City College of New York, followed by a master’s degree in medical anthropology from Binghamton University and a Doctor of Medicine degree from the University at Buffalo. She completed psychiatric residency training at the Zucker School of Medicine/Northwell Health, with experience in medication management, psychotherapy, and collaborative multidisciplinary care of adults and adolescents in the outpatient, inpatient, partial hospital and emergency settings.

Initial evaluations will involve collecting history about social circumstances; past medical, psychiatric, substance use, and family conditions; as well as current lifestyle habits such as sleep, nutrition, supplement use, level of physical activity, and stress management skills.

Treatment sessions will explore the mind-body connection and individual lifestyle factors in combination with psychoeducation for a personalized wellness approach.

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