Meet the leaders who set our standards

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.

Dr. De Paz received his medical degree from the University of Texas Medical Branch in Galveston, TX, and has been practicing for 9 years. He completed his psychiatric residency and child and adolescent psychiatry fellowship training at the University of Texas Medical Branch. After completing training, he worked at the Center for Health Care Services in San Antonio, TX. He worked with special needs children and adults who required the highest level of care both behaviorally and medically. He then continued his treatment of children and young adults at CommuniCare Health Center also in San Antonio. He served as Director of Behavioral Health for CommuniCare for 4 years. Dr. De Paz completed his undergraduate studies in Psychology and Biology at the University of Houston in Houston, TX. While having treated a wide variety of patients, his primary clinical focus has been the treatment of ADHD in children and adults, and working with special needs children and adults who may have Autism Spectrum Disorder or other Intellectual or Developmental Disabilities. Dr. De Paz's practice focuses on medication management. He offers medication management evaluations and follow-up visits. If the need arises, he works with licensed therapists to provide behavioral support.

Dr. Laura Mayol is double-boarded in child and adolescent psychiatry and adult psychiatry. She has been practicing for over 12 years. Dr. Mayol practice focuses on medication management, which is offered in conjunction with supportive therapy offered in 30 min visit follow-up visits. However occasionally Dr. Mayolmay believe additional therapy is needed and ask you to bring a therapist into your care team to provide the best outcome.

Dr. Mayol received her medical degree from the University of Puerto Rico School of Medicine in San Juan, Puerto Rico. She completed her residency in adult psychiatry at Jackson Memorial Hospital in Miami, FL. She pursued her fellowship in child and adolescent psychiatry at the University of Florida, in Gainesville. After completing training, Dr. Mayol worked with children and adult in a variety settings including Community Mental Health Centers and hospitals, providing both inpatient and outpatient services.

Dr. Mayol then became a Clinical Assistant Professor for the University of Florida Department of Psychiatry and provided clinical services for UF Student Mental Health at the Counseling and Wellness Center. While treating a wide variety of patients, her clinical focus has been on treating adolescents and young adults with mood and anxiety disorders

Dr. Sophia Monsour holds the position of Chief Psychiatrist for Pennsylvania at Talkiatry. After completing residency in 2013 at Albany Medical Center, she has spent the past 9 years fulfilling her passion for integrated and specialty care for adults suffering from mental illness. Her years of experience have included working as an integrated care Psychiatrist at a community health center, a medical director of a Partial Hospital and Intensive Outpatient Program (PHP/IOP), and also working for an Assertive Community Treatment Team (ACT) specializing in the Serious Mentally Ill (SMI) population. Most recently, she has been serving our veterans as the Outpatient Section Chief, Primary/Mental Health Integration Medical Director and Resident/Medical Student Coordinator at VA Pittsburgh. Dr. Monsour has an approachable style when treating individuals who suffer from various diagnoses, especially those with prior trauma. She provides supportive psychotherapy and at times uses psychodynamic therapy skills to address her patient's current stressors and to identify the root cause of their ailment. She believes in a holistic approach and utilizes mindfulness as a technique along with medication management.

Dr. Kira Posterarois double board-certified in General and Addiction Psychiatry and has over 10 years of clinical practice experience. She completed residency training at Allegheny General Hospital in Pittsburgh, PA, followed by a fellowship in Addiction Psychiatry at Beth Israel Medical Center in New York, NY. Her career has included serving as Director of Psychiatric Services at an addiction treatment center in Pittsburgh, PA, as well as Section Chief Psychiatrist for Addiction Services and then Chief of Psychiatry at VA Pittsburgh Healthcare System, where she had the honor of caring for our nation’s Veterans for nearly 9 years.  

Dr. Posteraro approaches care collaboratively and holistically, combining motivational interviewing, supportive therapeutic techniques, and evidence-based medication management. She meets patients where they are, working together to create personalized treatment plans that support recovery and overall well-being. While she specializes in the treatment of substance use disorders,

Dr. Posteraro has broad experience treating mood disorders, anxiety disorders, and trauma-related conditions across diverse patient populations.

Dr. Tamoria is a California native whose career has taken him around the country. As a medical student at Temple School of Medicine in Philadelphia, PA he worked in a culturally diverse, urban community. He was Chief Resident at the “President’s Hospital” in Washington DC and spent the first part of his career serving as an active-duty Navy psychiatrist helping servicemembers and veterans. After the Navy, he returned west to WA whereas a Medical Director he led one of the state’s most successful behavioral health programs through COVID and into the telehealth revolution. Now he serves as Talkiatry’s first West Coast Chief leading and supporting psychiatrists across the western US.

Dr. Tamoria works with adults to diagnose and treat a wide variety of mental health conditions including Depression, Anxiety, ADHD, Bipolar Disorder, PTSD, and more. He uses a combination of medication management and psychotherapy treatment to help patients improve and thrive. He is well experienced in caring for patients with complex histories or co-morbid medical conditions.

In the first appointment with Dr. Tamoria he completes a comprehensive evaluation of mental health symptoms, medical history, social supports, and stressors. He works collaboratively with patients to develop a treatment plan that may include lab tests, managing medications, initiating psychotherapy, or referring to other specialists. Over time he builds on the patient’s strengths and resilience to lead to recovery.

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Dr. Satveet Khela is a board certified physician specializing in adult psychiatry. She has been practicing since 2021. In addition to focusing on medication management, Dr. Khela's practice also prioritizes a whole person approach, incorporating aspects of nutrition, lifestyle, mindfulness, and supportive or brief cognitive behavioral therapy into the treatment plan. Occasionally, Dr. Khela may believe that additional therapy is also needed and ask that you see a separate therapist to provide the best outcome. Dr. Khela received her undergraduate degree from the University of California, Berkeley and her medical degree from A.T. Still University. She completed her residency at University of California San Francisco Fresno, where she served as chief resident in her final year. After completing her training, Dr. Khela worked with medically ill patients with co-morbid psychiatric illnesses. Throughout her career, Dr. Khela has worked with a diverse set of patients in various stages of their lives. Dr. Khela focuses on treating patients with anxiety, depression, PTSD, bipolar, OCD, and other mental health issues. She believes in empowering her patients to be active players in their treatment plans to facilitate the best care possible.

Dr. Cabrera is a board‐certified psychiatrist with several years of experience working with an ethnically and culturally diverse population in outpatient, inpatient, and psychiatric emergency room settings. Most recently, Dr. Cabrera practiced privately treating adults with a wide range of mental illnesses both in person and via telepsychiatry. Prior to this, she was an attending psychiatrist in the outpatient department and in the Comprehensive Psychiatric Evaluation Center at Mount Sinai Beth Israel where she also served as Associate Training Director of Psychiatric Residency Training. Dr. Cabrera has a strong background in psychopharmacology and supportive and psychodynamic psychotherapy.

Dr. Deringer is a psychiatrist with board certification in general psychiatry and addiction psychiatry. She earned her M.D. from the University of Michigan Medical School, and she completed her psychiatry residency and addiction psychiatry fellowship training at New York University. She has previously held faculty roles at New York University School of Medicine and Harvard Medical School. She has been involved in training the next generation of psychiatrists through her past work on the Program Director team for the MGH-McLean Psychiatry Residency Program. She has expertise in treating adults with mood disorders, anxiety disorders, substance use disorders, personality disorders, trauma, and ADHD.

Dr. Deringer cares deeply about understanding each patient's unique experience.  She recognizes that mental health symptoms are impacted by an individual's biological make-up, social situation, and their individual way of interacting with others in the world.  She will assess all of these factors and work with you to develop an appropriate treatment plan to help you feel better and meet your goals.  She incorporates supportive psychotherapy into all of her patient meetings; this may include discussions of the role of nutrition, exercise, and sleep habits in your overall well-being.

Dr. Deringer will begin the evaluation process with a thorough one-hour session in which we will discuss your current symptoms, your prior treatment history, your medical history, and your goals for treatment.  At the end of that session, she will begin to formulate her diagnostic impression and treatment recommendations.  Sometimes, the evaluation process may require more than one session, and it may be helpful for Dr. Deringer to gather information, with your permission, from prior treatment or to collaborate with your therapist if you have one.  Dr. Deringer will work with you on a medication treatment plan, if clinically indicated, to help you manage your symptoms and achieve your treatment goals.

Most of my work as a psychiatrist is with adults navigating PTSD, OCD, and the shifts that come with becoming a parent, including postpartum depression. I also spend time with people managing more complex patterns, like personality disorders, bipolar disorder, and anxiety that has quietly reshaped their daily lives. I trained in general adult psychiatry at Baylor College of Medicine, where I served as Chief Resident of Education in my final year, and I bring an analytical, problem-solving mindset to sorting out what's actually driving a person's symptoms.

I don't think good treatment can start until I understand someone fully, so the first visit is a thorough evaluation where I take my time with your history, your symptoms, and what you're actually hoping to change. Medication management is the foundation of what I do, but it's one piece of the picture, not the whole plan. Depending on what you need, I'll fold in supportive therapy or recommend adding a therapist so the care around you is well-rounded. I try to be transparent about my reasoning and to build decisions with you rather than hand them down, and I tend to look for the strengths already there to work from.

I especially find common ground with parents and caregivers trying to hold their own health steady while looking after everyone else. The first step is really just a conversation, and we sort out the direction together once I understand where you're starting from.

Rebecca Kostopoulos, PMHNP, is a board-certified psychiatric nurse practitioner committed to helping individuals facing mental health challenges lead full and balanced lives.

Her practice primarily focuses on medication management, often combined with supportive or emotionally focused therapy during 30-minute follow-up visits. When appropriate, Rebecca may recommend involving an additional therapist to ensure the most effective and comprehensive care.

She earned her Master of Science in Nursing with a specialization in psychiatry from Columbia University and her Bachelor of Science in Nursing from Boston College. Her training includes psychiatric diagnosis, medication management, and both psychodynamic and cognitive-behavioral therapies.

With over a decade of experience, Rebecca has evaluated and treated adults in a variety of clinical settings. Her previous roles include working at Elmhurst Hospital’s Comprehensive Psychiatric Emergency Program, Gracie Square Hospital’s inpatient unit, as well as in community health centers and skilled nursing facilities.

As a nurse practitioner, Rebecca believes that mental health is just as vital as physical health. She values the therapeutic relationship and approaches treatment with empathy and collaboration, ensuring that each patient receives personalized and compassionate care.

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