Gregory Miller, DO

More Clinicians

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.

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Miranda Morgan, DO

Staff Psychiatrist

Dr. Miranda Morgan is a board-certified psychiatrist licensed in New York and Texas. She is a Diplomate of the American Board of Psychiatry and Neurology and a member of the American Psychiatric Association. She earned her undergraduate degree in Psychology from The University of Texas at San Antonio and her medical degree from the Alabama College of Osteopathic Medicine. She completed her residency in psychiatry at Texas A&M University - Temple/Baylor Scott & White Hospital, where she was Recruitment Chief Resident.

Dr. Morgan is passionate about collaborative care and telemedicine, and has held positions in primary care mental health and collaborative care settings. She previously worked as staff psychiatrist at the Department of Veterans Affairs, and held an academic appointment as Clinical Instructor for the Department of Psychiatry at New York University Grossman School of Medicine.

Dr. Morgan describes her practice style as, “patient-centered, compassionate care tailored to each individual's unique mental health needs. As a psychiatrist, I am dedicated to helping my patients overcome their mental health challenges and achieve their goals.

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Diane Lewis, MD

Staff Psychiatrist

Background and credentials

Dr. Diane Lewis is board-certified in general psychiatry by the American Board of Psychiatry and Neurology. She earned both her undergraduate and medical degrees at Texas A&M University (College Station and Temple, TX) before completing her general psychiatry residency at UT Southwestern - Austin Programs (now Dell Medical School residency programs). After her residency, she practiced for eight years as a staff psychiatrist at the University of Texas' student counseling center. She also has experience working in hospital admissions and emergency department settings.

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Treatment approach

Dr. Lewis employs a medication-management-focused approach typically paired with supportive therapy during 30-minute follow-up visits. She strongly values a collaborative treatment approach, frequently encouraging patients to incorporate additional therapy for the best outcomes. Her primary specialty is college mental health, treating patients aged 18-45 with a range of mental health conditions from mild to complex. Dr. Lewis emphasizes authenticity, compassion, and recognizing patients beyond their diagnoses, providing care tailored to individual circumstances and goals.

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What you can expect in a first visit

During a first visit, patients can expect Dr. Lewis to conduct a thorough evaluation, carefully listening to their concerns, and considering their symptoms within the broader context of their lives. Her patients appreciate her down-to-earth and compassionate communication style. She aims to create an environment where patients feel understood, respected, and actively involved in shaping their personalized treatment plan, often recommending additional therapy support when beneficial for achieving optimal outcomes.

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Why Talkiatry?

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Ruben Mendez, MD

Staff Psychiatrist

Dr. Mendez obtained his medical degree from the University of Texas Medical School in Houston. He subsequently completed his Psychiatry residency training at the same institution, UT Medical School in Houston. Dr. Mendez has extensive training in the field and is board certified in Adult Psychiatry by the American Board of Psychiatry and Neurology. After professional training, Dr. Mendez has had vast experience of 15 years primarily in the outpatient setting including ample experience with telemedicine services to patients. He has extensive experience in diagnosing and treating adult patients dealing with attention deficit disorders and a wide spectrum of adjustment and anxiety disorders. Dr. Mendez has a special interest in the treatment of mood disorders from Major Depression to Bipolar spectrum disorders. Dr. Mendez prioritizes the development of great communication, mutual understanding and trust with his patients as he finds these elements to be key to a successful treatment. He establishes his treatment plans upon evidence-based guidelines and encourages a holistic approach for optimal well-being. Through effective medication management and supportive psychotherapy, Dr. Mendez leads his patients to optimal mental health. He encourages patients to strive to develop fulfillment and optimal functionality in their life's roles.

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Luke Romanow, MD

Staff Psychiatrist

Dr. Romanow is double board-certified in Adult Psychiatry and Forensic Psychiatry. He graduated summa cum laude from the University of Pittsburgh with a Bachelor of Science degree in Sports Medicine/Athletic Training and then attended Drexel University College of Medicine. After medical school, he completed his residency in Adult Psychiatry at the University of Virginia, where he obtained a certificate in additional psychotherapy training. After residency, Dr. Romanow completed a fellowship in Forensic Psychiatry at the University of Virginia. During his fellowship, he trained at the prestigious Institute of Law, Psychiatry, and Public Policy (ILPPP) and Western State Psychiatric Hospital where he performed criminal and civil forensic evaluations. He also provided clinical care at a maximum security prison. Prior to joining Talkiatry, Dr. Romanow worked at a healthcare system in Montana providing inpatient and outpatient psychiatric care involving medication management and psychotherapy. Additionally, he operates a private forensic psychiatry practice that conducts mental health evaluations for the legal system. Dr. Romanow has extensive experience treating various mental health disorders including depression, bipolar disorder, anxiety and obsessive-compulsive disorders, post-traumatic stress disorder, and ADHD. His clinical work includes assisting patients who experience mental health disorders with co-occurring substance use problems. He has training in various schools of psychotherapy including cognitive behavioral therapy (CBT), CBT for insomnia, motivational interviewing and supportive psychotherapy. Dr. Romanow incorporates treatment focusing on the importance of exercise, diet, and good sleep habits as a part of comprehensive mental health care.‍

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Alexandra Hill, MD

Staff Psychiatrist

Dr. Hill is a recent graduate of the psychiatry residency program at the University of Colorado School of Medicine. During her residency, she sought out additional training in psychodynamic therapy and EMDR. She participated in the Psych Scholars track, which provided in-depth education and supervision around therapy and psychoanalytic theory. This allows her to better understand the role of both medication and therapy, to utilize, when to couple them, and what limitations they may have. She has additional interests in trauma work; women's mental health, specifically in the peripartum period; and in working with individuals facing progressive diseases or terminal diagnoses.‍

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Other Clinicians

Jennifer Ruch, DO

Staff Psychiatrist

Dr. Jennifer Ruch is a board-certified psychiatrist who strives to understand her patients' lived experiences and aspirations to develop supportive therapeutic relationships through empathetic listening, mutual trust, and respect. She collaboratively creates individualized care plans that align with personal treatment goals in a safe and judgment-free environment. After completing her Bachelor of Science degree in Human Biology with a focus in psychology from the University of California, Merced, she earned her medical degree from Lake Erie College of Osteopathic Medicine. Dr. Ruch completed her General Psychiatry Residency at Arnot Ogden Medical Center in New York. Her clinical experience involves treating individuals of all age groups from diverse populations and socioeconomic backgrounds suffering from anxiety, depression, bipolar disorder, psychotic disorders, neurodevelopmental disorders, and neurocognitive disorders. She has provided care in inpatient and outpatient psychiatric facilities, the Veterans Affairs Medical Center, emergency rooms, state facilities, and an inpatient chemical dependency center. She also performed pre-procedure psychological evaluations for bariatric and spinal cord surgeries, and psychiatric consult liaison services on medical units and has clinical training in inpatient and outpatient neurology. Her clinical experience incorporated treatment modalities such as pharmacotherapy and interventional psychiatry, including Transcranial Magnetic Stimulation and Spravato. Dr. Ruch integrates a wide array of psychotherapy as needed; however, her practice primarily focuses on medication management while utilizing referrals to therapists and providing collaborative care for optimal outcomes.

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Diana Veliz, LCSW

Staff Licensed Clinical Social Worker

Diana Veliz, LCSW, obtained her MSW from Fordham University. Diana has over 3 years of experience providing client-centered therapy. Her practice is sensitive to race and culture, and trauma-informed. Diana has experience working with adults, and adolescents experiencing anxiety, depression, and other mental health disorders. She has worked in outpatient/inpatient clinics and in an educational setting supporting children with social emotional learning. Diana believes that the best approach is to work collaboratively with the client while also considering that each person's experience is individual to them. The client is an expert in their lives, and as a clinician, she is there to meet the client where they are at and begin the healing journey through non-judgment and compassion. Diana uses cognitive behavioral therapy, solution focused approach, and psycho-education. She also considers the client's place in society and how culture and race can contribute to challenges. Diana takes passion in working with clients to improve self-esteem, recognize schemas, regulate emotions, and develop self-awareness.

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Ioana Horotan-Enescu, DO

Staff Psychiatrist

Dr. Ioana Horotan-Enescu is a board-certified Psychiatrist. Before joining Talkiatry, she was an Active-Duty staff psychiatrist at Blanchfield Army Community Hospital, Fort Campbell, KY. Her military service also included roles such as Medical Director of Behavioral Health and Interim Clinic Chief for Embedded Behavioral Health Clinic. She completed her internship and residency at Walter Reed National Military Medical Center and earned her Doctor of Osteopathy Degree from the University of New England College of Osteopathic Medicine. Her clinical experience spanned from the inpatient to the outpatient setting and afforded her the opportunity to develop comprehensive skills in the treatment of PTSD, mood disorders, thought disorders, addiction and perinatal mood disorders. Her teaching experience spanned multiple institutions, where she has served as a preceptor and mentor for medical students, nurse practitioner and physician assistant students. In addition to medication management, she augments her practice by implementing mindfulness, psychodynamic and supportive therapy techniques in her everyday practice to enhance treatment and improve treatment response. Dr. Horotan-Enescu holds several certifications, including in Cognitive Behavioral Health Therapy for Suicide Prevention, Motivational Interviewing and Battlefield Acupuncture. She has delivered presentations at national and international conferences on various topics, reinforcing her commitment to advancing the field of psychiatry.

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Brianna Quirk, LMHC

Staff Therapist

Brianna Quirk is a licensed mental health counselor in the state of New York. She attended SUNY Oneonta for her Bachelor’s degree in psychology, and went on to Adelphi University where she received her Master’s degree in Mental Health Counseling.

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Brianna has extensive experience working with children, adolescents, and adults with a variety of different struggles. Brianna is trained in cognitive behavioral therapy, and helps her clients to recognize and change harmful and unhelpful patterns of thought and behavior, implement coping skills, and set goals for the future, leading to a happier and healthier existence. She uses techniques from CBT, solution focused therapy, psychodynamic therapy, and more to tailor each client’s sessions to their individual needs.

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Brianna specializes in working with individuals from a variety of different backgrounds and mental health issues: such as anxiety, ADHD, stress, depression, trauma, school avoidance and grief/loss. She also has extensive experience working with members of
the LGBTQ+ community.

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Cosima Robinson, LPC

Staff Licensed Professional Counselor

Cosima Robinson holds a distinguished profile as a Licensed Professional Counselor, a Licensed Chemical Dependency Counselor, and a National Certified Counselor. She earned her Master of Science in Counseling from the University of Houston-Clear Lake. Presently, her licensure allows her to provide counseling services within the state of Texas. Drawing upon her extensive experience, Cosima Robinson adeptly delivers tailored therapeutic interventions catering to individuals of all age groups. She proficiently addresses a spectrum of mental health challenges, including but not limited to depression, anxiety, and various life obstacles. Her therapeutic approach is characterized by an impartial, supportive, and uplifting environment designed to foster healing. Cosima's professional background encompasses a diverse range of settings. She has proficiently guided individuals in contexts such as dual-diagnosis scenarios, substance abuse recovery, residential and intensive outpatient care facilities, correctional institutions, survivors of domestic violence, and at-risk youth and families. Her counseling methodology incorporates person-centered, cognitive-behavioral, and solution-focused modalities. Notably, she remains flexible in her application of techniques, ensuring that each intervention is meticulously tailored to suit the distinct requirements of her clients.

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Tait Dalton, MD

Staff Psychiatrist

Dr. Dalton is a board-certified psychiatrist who has specialized in treating adults with mental health issues for over 16 years. He received his medical degree in 2004 from the American University of the Caribbean School of Medicine. He completed his residency in General Psychiatry in 2008 at Cooper University Hospital in New Jersey. He has extensive experience working with adults in a wide variety of psychiatric settings. His adventurous spirit led to his first job out of residency in New Zealand, where he worked as a psychiatric consult liaison in both the hospital and ER settings. He has also worked for several years as an Outpatient Psychiatrist within the VA Medical Healthcare System. He worked for Presbyterian Medical Services in New Mexico as an Outpatient Psychiatrist for 4 years where he was eventually promoted to Regional Director of Psychiatry. He also worked for several years as an inpatient staff psychiatrist for the New Mexico State Hospital in both urgent and long-term care settings. He has spent the last several years as a traveling Outpatient Psychiatrist. His travels have taken him all over the country including Alaska, Hawaii, Texas, Washington, Minnesota, Alabama and California. ‍Dr. Dalton believes in a comprehensive, compassionate, and collaborative approach to patient care. He specializes in psychiatric medication management, while also providing supportive therapy and psychoeducation. If warranted, he may ask that you bring a therapist into your care team to help facilitate an optimal therapeutic outcome. He treats a wide array of psychiatric issues including, but not limited to, the following: Depressive Disorders, Anxiety Disorders, Post-Traumatic Stress Disorder (PTSD), Bipolar Disorder, Sleep Disorders, Obsessive-Compulsive Disorder (OCD), and Attention-Deficit/Hyperactivity Disorder (ADHD).

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Gregory Miller, DO

Education and training

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