Fang Yang, MD

Dr. Weasen is a board-eligible adult psychiatrist with Talkiatry. He received his medical degree from Sidney Kimmel Medical College at Thomas Jefferson University in Philadelphia. He then moved to Washington, D.C. to complete his residency training at Saint Elizabeths Hospital, where he served as Chief Resident during his final year. He is a member of the American Psychiatric Association (APA) and has presented at the APA Annual Meeting on the topic of virtual fatigue. He has had extensive experience working with a wide array of patients, including college/graduate students, geriatric patients, military veterans, and LGBTQ+ populations.

Dr. Weasen provides a combination of medication management and supportive psychotherapy. Occasionally, he may work with you on finding additional support as well, including bringing on a dedicated therapist as part of your treatment team. He believes in tailoring treatment to each person’s needs. He primarily treats mood disorders, anxiety disorders, ADHD, PTSD, OCD, and insomnia, but believes in seeing beyond the diagnosis and focusing on the individual first and foremost.

Background and credentials

Dr. Matthew Koller is a board-certified adult psychiatrist who completed his undergraduate training at The University of Texas at Austin. He earned his medical degree from The University of Texas Health Science Center at San Antonio and completed his general adult psychiatry residency at Baylor College of Medicine in Houston, TX, where he served as Chief Resident of Education in his final year of training.

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Treatment approach

Dr. Koller believes that understanding a patient fully is essential before treatment begins, emphasizing a collaborative and patient-centered approach to care. His practice is primarily focused on medication management, but he also incorporates supportive therapy and other therapeutic modalities as needed. He may recommend including a therapist in the treatment plan to ensure comprehensive, well-rounded care. He has experience treating a wide range of mental health conditions, including depression, anxiety, insomnia, personality disorders, bipolar disorder, PTSD, and psychotic disorders.

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What you can expect in a first visit

During the first visit, patients can expect a thorough and individualized psychiatric evaluation, where Dr. Koller takes the time to understand their symptoms, history, and treatment goals. He prioritizes open communication and shared decision-making, working closely with patients to develop personalized treatment plans. While medication management is the foundation of his approach, he remains flexible and adaptive, incorporating therapy and other interventions as needed to help patients achieve optimal mental health.

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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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Dr. Avjola Hoxha, MD, has experience practicing in both outpatient and inpatient settings. She earned her medical degree from the University of South Carolina School of Medicine and completed her psychiatry residency and Child and Adolescent fellowship at the University of Florida. She is board-certified and passionate about providing comprehensive, patient-centered care.

Dr. Hoxha values open communication and works collaboratively with patients to set individualized treatment goals. She creates a warm, supportive environment where patients feel heard, respected, and empowered throughout their care.

During the initial session, Dr. Hoxha thoroughly explores each patient’s history, concerns, and goals. She ensures patients fully understand treatment options and develops individualized plans aligned with their goals, always respecting patient autonomy and fostering a collaborative approach to care.

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Dr. Yaejin Park is a board-certified adult psychiatrist at Talkiatry. She received her medical degree from the University of Illinois at Chicago School of Medicine and completed her psychiatry residency training at Mount Sinai Morningside West.

Dr. Park has professional interests in treating a wide range of psychiatric conditions including depression, anxiety, PTSD, and eating disorders.  She strives to provide compassionate and holistic care with the integration of supportive psychotherapy and medication management.

Lance Briggs is a dedicated Psychiatric Nurse Practitioner with over a decade of clinical and leadership experience. A graduate of the University of North Dakota, Lance began as a psychiatric RN in acute inpatient settings before becoming a psychiatric RN supervisor in a major Houston hospital while pursuing advanced practice.

After becoming a PMHNP, Lance initially worked with outpatient addiction treatment and severe mental illness populations, later expanding into bariatric psychiatry to support patients preparing for weight-loss surgery. When the COVID-19 pandemic paused bariatric procedures, Lance founded a private practice—Grey Matters Mental Health—in Seattle, which was later sold to a larger healthcare organization in Minnesota. Lance then transitioned into correctional mental health, serving underserved populations within the criminal justice system. Currently, Lance is working at Talkiatry, providing compassionate, high-quality care informed by experience across diverse and challenging environments.

Lance understands that every patient is unique. His approach is grounded in Carl Rogers’ principle of unconditional positive regard, creating a safe, calming space where patients feel heard and valued. Lance takes time to explore developmental history, family background, and major life events, recognizing how past experiences shape present challenges. He aims to understand each symptom fully and offers thoughtful, collaborative treatment options.

Gregory Miller, DO, is an adult psychiatrist who prioritizes understanding his patients by first listening to their stories. He collaborates with them to develop both pharmacological and non-pharmacological solutions aimed at improving their functionality. Dr. Miller emphasizes that functioning better often leads to feeling better. Whenever possible, he approaches treatment within the context of the family system surrounding the individual. Raised in South Carolina, and now residents of Florida, Dr. Miller and his wife of 31 years have six children. He enjoys outdoor activities and team sports and is an avid fan of Tolkien and C.S. Lewis. He at times incorporates analogies from their works into therapy if appropriate.