Mayra Cabrera Dean, MD

Dr. Nicholas Sahagian is a Psychiatrist in Colorado who has been practicing since 2023. He completed his MD and Adult Psychiatry Residency at the Chicago Medical School at Rosalind Franklin University and earned his BA in Neuroscience at Skidmore College. Dr. Sahagian has experience managing a broad array of complex psychiatric diagnoses in patients of diverse socioeconomic, cultural, and clinical backgrounds. Outside of work, he enjoys hiking, biking, skiing, playing guitar, reading, and collecting board games.

Dr. Sahagian offers psychiatric medication management while also incorporating elements of cognitive behavioral therapy, motivational interviewing, internal family systems, and lifestyle interventions. He believes that every patient is unique, and he works to create a supportive environment where individuals feel heard and empowered in their care.

Grounded in the biopsychosocial model, Dr. Sahagian takes a collaborative, patient-centered approach. He partners with patients to develop personalized treatment plans that integrate biological, psychological, and social factors, with the goal of guiding them along their path to improved wellness.

Dr. Joshua Riederman is a board-certified psychiatrist with a specialization in the treatment of adults aged 18 to 65. Dr. Riederman obtained his undergraduate degree in brain, cognition, and neuroscience from the University of Michigan in Ann Arbor. He subsequently attended medical school at Nova Southeastern University in Fort Lauderdale, Florida, and completed his residency training at JFK Hospital in Palm Beach, Florida.

Dr. Riederman places a strong emphasis on establishing meaningful relationships with his patients and supporting them in achieving their individual life goals through effective treatment. He actively incorporates patient preferences into all treatment plans and integrates psychotherapy with medication management. Dr. Riederman recognizes the importance of educating patients about their care and dedicates time during each appointment to address any questions or concerns they may have.

In his clinical practice, Dr. Riederman begins by facilitating an open dialogue with patients regarding their primary concerns for the appointment. During initial consultations, he conducts a comprehensive assessment, which includes gathering relevant medical, familial, and social histories that may influence the course of treatment. In subsequent appointments, Dr. Riederman engages patients by inquiring about developments that have occurred since their last visit, as well as any issues related to medications or significant life events.

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Dr. Chhavi Chaudhary is a dual board-certified psychiatrist with subspecialty certification in Child and Adolescent Psychiatry. She completed her fellowship at Washington University in St. Louis, where she also served as Chief Fellow, and her general psychiatry residency at the University of Texas Health Science Center at Tyler. Over the past year, she has provided telehealth psychiatric consultations across emergency rooms and inpatient settings, gaining extensive experience across state hospitals, outpatient clinics, college mental health, preschool, mood disorder, and community health clinics.

Patients working with Dr. Chaudhary can expect a thoughtful and collaborative approach. She emphasizes understanding each individual in the context of their psychosocial development, life experiences, and cultural and societal stressors. She believes mental health cannot be separated from the challenges faced at school, work, within families, and in society at large.

Dr. Chaudhary’s style is warm, curious, and collaborative. She listens carefully, ensuring patients and families feel understood, and works together to create practical, personalized treatment plans. She integrates psychopharmacology with therapy, coping strategies, and resilience-building, aiming for patients to feel supported, empowered, and actively engaged in care that evolves with their needs.

*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.

Dr. Lauren Miller earned her medical degree from Loma Linda University and completed her psychiatry residency at the University of Miami. She has experience working in both inpatient and outpatient psychiatry, caring for individuals from diverse backgrounds and with a wide range of clinical needs. Dr. Miller has a special clinical interest in lifestyle and integrative psychiatry, particularly the role of nutrition, exercise, sleep, and mind-body practices in supporting mental health.

Dr. Miller strives to create a warm, collaborative, and non-judgmental environment where patients feel truly heard and supported. She values whole-person care, addressing not only mental and emotional health, but also physical and spiritual well-being. She believes in partnering with patients to create treatment plans that reflect their values, goals, and strengths. Her approach emphasizes accessibility, practicality, and empowerment, providing patients with tools they can integrate into daily life.

Dr. Miller begins with a thorough, compassionate evaluation, taking into account both medical and psychiatric history as well as personal goals. She develops personalized treatment plans that may include a blend of medication, psychotherapy, and lifestyle approaches. Dr. Miller encourages small, sustainable steps in areas such as nutrition, sleep, movement, and stress management, with the goal of not only reducing symptoms but also building resilience and long-term wellness.

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.