Luna Sanchez Rivera, MD

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.

Dr. Holly Shiao is a psychiatrist who has worked extensively with medically complex patients, including a special focus in psycho-oncology with cancer patients. She is double board-certified in Consultation-Liaison Psychiatry and Adult Psychiatry. She has been practicing for over 7 years. Before Talkiatry, Dr. Shiao worked as an Assistant Professor at the University of Washington and Fred Hutchinson Cancer Center. She also worked as an Assistant Professor and was Director of Emergency Psychiatry at the University of Chicago. She has presented nationally at the Academy of Consultation-Liaison Psychiatry and written a book chapter about psycho-oncology. Dr. Shiao attended medical school at John P. and Kathrine G. McGovern Medical School at the University of Texas Health Science Center at Houston. She then completed an Adult Psychiatry residency at the University of Texas Medical Branch at Galveston, followed by a Consultation-Liaison fellowship at Dell Medical School at the University of Texas at Austin. Dr. Shiao is interested in the mind-body connection in overall emotional and mental well-being. She likes to integrate therapy modalities, such as cognitive behavioral therapy, supportive therapy, mindfulness and meditation with medication management to optimize a patient's mental health.

Dr. Bernard is a board-certified Psychiatrist from New Orleans, LA, with fellowship training in Consultation-Liaison Psychiatry at Stanford University. His career has spanned both academic medicine and clinical leadership, including serving as Medical Director of a hospital-based C-L Psychiatry service and teaching medical students and residents. His background in academics, leadership and subspecialty training allows him to bridge all aspects of his patient's health. His hobbies include yoga, meditation, martial arts, snowboarding and inline hockey.

Patients can expect a thoughtful, respectful, and collaborative approach. He works to understand both the biological and psychological aspects of each person’s experience, and he believes in creating individualized treatment plans that are practical and evidence-based. His style emphasizes open communication, setting clear goals together, and making sure patients feel heard and supported throughout their care.

He begins with a comprehensive assessment to understand each patient’s medical, psychological, and social background. From there, he partners with patients to identify their goals and tailor a treatment plan that may include psychotherapy, medication, lifestyle modifications or coordination with other healthcare providers. He regularly checks in on progress, adjusts as needed, and strives to create a therapeutic relationship that feels safe, structured, and effective.

Dr. Latori Griffin is a Licensed Marriage and Family Therapist with over 10+ years' experience in helping clients with relationship issues, family conflicts, trauma and abuse, intimacy related issues, and personality distress. Her specialty areas include seeing clients from underserved backgrounds with challenging life circumstances, racial/cultural traumas, substance use/abuse, career and educational planning, and relational traumas. Her goals are to offer a holistic approach to therapy that is concerned with the whole person and is conducive to growth and healing. Considering the spiritual, emotional, physical, psychological, social, and societal aspects of a client's experiences are of the utmost importance in creating an environment of warmth and support. Dr. Griffin works with clients to create an open and safe environment where thoughts and feelings can be shared without fear of judgment, and she will tailor the treatment plan to meet the clients' unique and specific needs. It takes courage to seek out a more fulfilling and happier life and to take the first steps towards a change. Dr. Griffin is here to support & empower clients on that journey.

Justin Stone is a board-certified Psychiatric-Mental Health Nurse Practitioner (PMHNP) with experience in both outpatient and inpatient psychiatric settings, including in-person and telehealth care. He completed his undergraduate and master’s programs at Southern Adventist University in Collegedale, Tennessee. Justin is committed to providing compassionate, patient-centered care that addresses the whole person—mind, body, and environment.

Justin works collaboratively with patients to reach personal goals and support a more fulfilled life. He strives to create an open, judgment-free relationship where patients can be completely themselves. His aim is to provide a safe space for vulnerability without fear of judgment, fostering trust and partnership in the therapeutic process.

Patients can expect a thorough initial evaluation to ensure the correct diagnosis is addressed from the start. Justin prioritizes safety and evidence-based best practices while tailoring treatment plans to individual goals. His approach is focused on developing personalized strategies that help patients achieve meaningful improvements in mental health and overall well-being.

Jill Condon is a board-certified Psychiatric Nurse Practitioner with Talkiatry. She obtained a Bachelors of Arts in Psychology from Anderson University in 2011, and went on to obtain her Masters of Science in Nursing from Vanderbilt University in 2016. She has over 8 years of experience working with clients of all ages. She has experience working in community mental health, private practice, and inpatient populations. She has experience working with a variety of mental health concerns including ADHD, anxiety, depression, OCD, and PTSD.

Jill has a passion for fostering whole person health in her clients. She has a direct and collaborative approach to care. She will work with you to discover where you are in your mental health journey and create an individual plan for moving towards healing. She helps you explore how all facets of your health are affecting your mental health.

The process starts with an in-depth initial assessment that includes looking at physical, mental, emotional, social, spiritual, and environmental wellbeing. She utilizes a variety of techniques including psychiatric medications, supportive therapy interventions, and lifestyle modifications to help you reach your goals.