Matthew Koller, MD

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 psychiatry 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.

Dr. Arballo is a board-certified psychiatrist who completed medical school at Lake Erie College of Osteopathic Medicine. He received residency training at the University of Texas Health - San Antonio, where in addition to clinical training, he was appointed resident chair of the Quality Improvement and Patient Safety Committee. Since graduation, he has been a staff psychiatrist and the military unit director at Cumberland Hall Hospital, providing comprehensive care to children, adolescents, adults, and geriatric patients. Dr. Arballo provides evidence-based medication management and psychotherapy to address mental health conditions. He is a strong advocate for patient autonomy, quality improvement and psychoeducation.‍

Dr. Stephane Louis, LMFT, QS, earned a B.S. in Psychology and Biblical Studies from Palm Beach Atlantic University, followed by her M.S. and PhD in Marriage and Family Therapy from Nova Southeastern University. In 2020, she was featured in Forbes for her study of resilience and intersecting identities in queer women of Afro-Caribbean descent. Past roles include bilingual mental health assessor, psychology instructor at Broward College, and Student Counselor at Lynn University. As a therapist, Dr. Louis’ work has given her in-depth insight into how multiple systems and important relationships can influence the course of a person’s life.

As a queer woman of Haitian descent, Dr. Louis explores different ways the intersectionality of culture, family, identity, and sexuality can impact our lives. She is fascinated by stories of vulnerability, always looking for strengths and solutions. She helps people feel safe to be themselves and go from where they are to where they can be.

Dr. Louis provides individual, couples, and family therapy, integrating Accelerated Resolution Therapy (ART), Solution-Focused Therapy, collaborative conversations, and systemic approaches to address LGBTQ+ issues, racial trauma, cultural identity exploration, and relational wounds. Dr. Louis will meet you where you are and help you grow into the most authentic version of yourself.

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Background  and credentials    

Dr. Columban Heo is a board-certified psychiatrist. He earned his medical  degree from Touro University Nevada and completed his residency at Unity  Health White County Medical Center. Dr. Heo further specialized by completing  a fellowship in Consultation-Liaison Psychiatry at the Cleveland Clinic,  where he gained extensive experience working within multidisciplinary  healthcare teams, particularly focused on psychiatric care for patients with  complex medical conditions.    

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Treatment approach  

Dr. Heo specializes in treating a broad range of psychiatric conditions,  notably mood and anxiety disorders. He integrates medication management with  a holistic, personalized approach to treatment, emphasizing the  interconnectedness of mind, body, and spirit. Dr. Heo believes in tailoring  treatment plans individually, combining therapy and medications to suit each  patient’s unique needs, and highlights the importance of healthy  relationships in achieving overall mental health.    

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What you can expect in a first visit    

Patients visiting Dr. Heo for the first time can expect a comprehensive and  personalized assessment that explores not just their psychiatric symptoms but  their overall well-being and personal relationships. Dr. Heo prioritizes a  holistic evaluation, carefully balancing medication considerations and  therapeutic interventions tailored specifically to each patient’s situation  and goals. He creates an empathetic, collaborative atmosphere to discuss and  develop personalized plans for mental and emotional wellness.  

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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. Sallie Jo Hadley holds the position of Staff Psychiatrist at Talkiatry. She is board-certified in psychiatry and pediatrics and is board-eligible in child and adolescent psychiatry. She has been practicing for 22 years. Dr. Hadley's practice is focused on medication management with supportive therapy in follow-up sessions of 15 or 30 minutes. Dr. Hadley is experienced with collaborative treatment and encourages adding a therapist to your care team in those situations where additional therapy might be helpful. Dr. Hadley is a graduate of the Mount Sinai School of Medicine's triple-board program (psychiatry, pediatrics, and child and adolescent psychiatry). She completed post-doctoral research fellowships at Mount Sinai's Seaver Center for Autism Research/Compulsive-Impulsive Anxiety Disorders and at Columbia University's New York State Psychiatric Institute, the latter focusing on metabolic and weight issues in children and adolescents with psychiatric disorders. Dr. Hadley had an early background as a nurse, receiving her B.S. in Nursing from the University of North Carolina-Chapel Hill. Her experience in neonatal, psychiatric, and hospice nursing led her to pursue her degree in medicine. Dr. Hadley has worked in pharmacologic research in both academic and industry settings. Prior to joining Talkiatry, she practiced in a multi-specialty clinic for individuals and families dealing with autism or intellectual disabilities and complex medical co-morbidities. Dr. Hadley enjoys working with motivated individuals of all ages who are seeking to better their life or better cope with life circumstances. She has particular expertise in working with individuals and their families suffering from anxiety, depression, and obsessive-compulsive disorders.

Cassandra Lozano, LPC, LCDC is located in Texas. She graduated with her bachelor's degree in psychology from the University of Texas-Brownsville. Following obtaining her master's degree in counseling and guidance from the University of Texas Rio Grande Valley. She has 10 years of experience in the addictions field and 7 years in mental health, working with her local mental health authority for the past 8 years. She has dedicated her career to specializing in addictive disorders, ADHD, individuals struggling with mood disorders such as depression, anxiety, self-esteem issues, and life transitions. Cassandra works with both adults and adolescents and is a strong ally of the LGBTQ community and Latinx communities. Her therapeutic approach is eclectic in nature, and client-centered. She collaborates with her clients, meeting them where they are and helping them find personalized solutions to achieve their goals and become their best selves. She utilizes a combination of Motivational Interview approaches, CBT, Solution-Focused counseling, and DBT. She ensures that clients are fully aware of their treatment goals and will work collaboratively to facilitate meeting their needs, finding meaning in life, and finding solutions to their current issues. In her personal life, Cassandra is the proud mother of two boys and enjoys tending to their Kuk Sool Won (martial arts) events. She loves relaxing on the beach and is very family oriented. She enjoys fishing, hunting, and off-roading in her jeep.