Rebecca Farias, MD

Dr. Zac Keller, DO, DABPN (he/his), is a board-certified psychiatrist with experience across inpatient and outpatient settings. He has held leadership roles including Interim Medical Director and Director at Richard Young Hospital, where he also created and led the hospital’s ECT program. Dr. Keller’s clinical focus includes ADHD, PTSD, and personality disorders, and he brings an integrative lens to psychiatric care.

Dr. Keller takes a collaborative, supportive, and evidence-based approach to treatment. He values confidentiality, culturally sensitive care, and trauma-informed practice. Known for his warm yet direct communication style, he works to create a respectful, nonjudgmental environment where patients feel heard, understood, and actively involved in their care.

Care begins with a comprehensive intake that explores medical, psychiatric, social, and functional aspects of a patient’s life. Session length and frequency are tailored to individual needs. Treatment plans are developed collaboratively and may include medication management combined with talk therapy and other evidence-based interventions. Progress is reviewed regularly and adjusted based on ongoing dialogue.

*THIS PROVIDER CANNOT PRESCRIBE CONTROLLED SUBSTANCES FOR NH PATIENTS* Dr. Peter Truong is a board-certified psychiatrist trained in Adult Psychiatry. He received his medical degree from FIU Herbert Wertheim College of Medicine in Miami, Florida, and completed his residency training at Cambridge Health Alliance – Harvard Medical School.

Dr. Truong treats each patient with a holistic, evidence-based approach that incorporates psychopharmacological and psychotherapeutic best practices. His priority is to build a safe and trusting working relationship with each patient, keeping in mind their unique biological, psychological, social, and spiritual contexts.

Dr. Truong has extensive experience treating depression, anxiety, ADHD, and trauma-related disorders. He incorporates therapy modalities such as supportive, psychodynamic, CBT, and EFT. Other professional interests include LGBTQIA and college mental health, mindfulness, and interventional psychiatry. He has worked with individuals with diverse backgrounds from all walks of life.

Lindsey Stewart, PMHNP, holds three Bachelor’s degrees in Biology, Medical Technology, and Nursing, as well as a Master of Science in Nursing. She began her nursing career in 2011, working in inpatient psychiatry, and later expanded her experience to community mental health and home health for patients with behavioral health needs. In 2018, she earned her PMHNP certification from the University of Missouri–Kansas City and has since spent six years providing behavioral health medication management at an FQHC, treating patients across the lifespan.

Lindsey is passionate about her work and values each patient’s unique life story. She focuses on meeting patients where they are and creating customized treatment plans that align with their goals. Her care is rooted in a patient-centered approach, ensuring collaboration and respect throughout the treatment process.

Lindsey’s process blends structure with flexibility, tailoring care to each patient’s needs. She begins by establishing a diagnosis and treatment plan, integrating medication management, therapy, collaborative goal-setting, and ongoing progress monitoring. This holistic approach supports both mental health and overall well-being.

Dr. Kerstin Asquith is a board-certified psychiatrist at Talkiatry. She has extensive experience working with a wide range of diagnoses and patient populations, with particular interest in treating depression, anxiety, PTSD, and OCD. She also has additional training in college mental health. Dr. Asquith believes in the importance of getting to know each of her patients and the unique issues that bring them into treatment. Her approach involves collaborating with patients to create personalized treatment plans and considering both medication and non-medication methods.

Dr. Asquith is from California and completed her undergraduate studies at the University of California, Davis. She obtained her medical degree from Creighton University School of Medicine and then trained at Stanford University's Adult Psychiatry Residency Program. She subsequently completed a fellowship in student mental health at Stanford University. Most recently, Dr. Asquith worked as an outpatient psychiatrist at The Permanente Medical Group. In her free time, she enjoys traveling, trying new foods, and spending time with friends and family.

Dr. Alejandra Cattan is a bilingual psychiatrist who delivers care in English and Spanish. She went to medical school in Buenos Aires, Argentina, and completed her psychiatry residency at Bronx Care Health system. She then completed additional training in Psychodynamic Psychotherapy at NY Medical College Psychoanalytic Institute. After completing residency, she worked as an attending psychiatrist in New York and later transitioned to dedicated outpatient work. Dr. Cattan brings exceptional care to her patients. She provides supportive psychotherapy and applies psychodynamic psychotherapy skills to discover the root of their suffering, in conjunction with medication management resources. Dr. Cattan believes in a biopsychosocial model to address her patients' issues. Her areas of expertise include medication management, mood disorders, anxiety disorders, bipolar disorder, PTSD, and substance use disorders.

Dr. Elaine Kwok is a board-certified Adult Psychiatrist who has been practicing for 9 years. She specializes in depression and anxiety and believes in a holistic approach to the wellness of both the mind and body. Dr. Kwok conducts a comprehensive and individualized assessment for each patient utilizing a combination of medication management, lifestyle changes, and coping skills, creating a safe and therapeutic environment to facilitate healing and growth .Dr. Kwok received her undergraduate degree from New York University and her medical degree from St. George's University. She then completed her residency training at Seton Hall University. After training, she worked in the inpatient and outpatient units at Capital Health Medical Center in Trenton, New Jersey. She was a voluntary faculty member and trained residents and medical students from Rutgers Robert Wood Johnson Medical School. She has training in Cognitive Behavioral Therapy and Dialectical Behavioral Therapy. She actively participates in her local community to provide education and training for mental health providers. Dr. Kwok strives to collaborate and address hindrances that may interfere with an individual's best self. She focuses on creating a strong therapeutic relationship to support and facilitate balance, lifestyle enhancement, and emotional well-being. She looks forward to getting to know you and embarking on this journey together.