Matthew Koller, MD

Staff Psychiatrist
Languages
English
Conditions Treated
Anxiety
Bipolar Disorder
Depression
Obsessive-compulsive disorder (OCD)
PTSD/Trauma
Phobias
Postpartum Depression
Geriatric

Education and training

•  University of Texas at Austin, BS

•  University of Texas, San Antonio, MD

•  Baylor College of Medicine, Residency

Get to know

Matthew Koller, MD

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.

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.

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.

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.

Get matched with a clinician like this one

Ready to book your first appointment? Take our 10-minute assessment. We’ll match you with a clinician who meets your needs, has availability, and takes your insurance.

Get started
More Clinicians

Osman Athar, MD

Mark Helms, MD

Jorge Corona, MD

Peter Szeibel, MD

Mark Varela,MD

Lillian Cole, MD

Staff Psychiatrist

Background and credentials

Dr. Lillian Cole is a board-certified adult psychiatrist. She completed her undergraduate education at the University of North Carolina Wilmington and went on to earn both a master’s in biomedical sciences and a medical degree from Texas Tech University. She completed her psychiatry residency training at the University of Texas Southwestern Medical Center, where she gained experience working with a diverse range of patient populations across different ethnic, socioeconomic, and clinical backgrounds.

Treatment approach

Dr. Cole emphasizes a holistic, patient-centered approach that integrates evidence-based medicine, psychotherapeutic techniques, lifestyle interventions, and psychoeducation. She believes that listening, collaboration, and compassion are essential to guiding patients toward recovery. Her practice primarily focuses on psychiatric medication management, and she has extensive experience treating mood disorders, anxiety, trauma-related disorders, and substance use disorders. When additional therapy is necessary for the best outcome, she may recommend integrating a therapist into the treatment plan.

What you can expect in a first visit

Patients can expect a thorough and compassionate initial evaluation, where Dr. Cole takes the time to understand their symptoms, medical history, and treatment goals. She focuses on fostering a strong doctor-patient relationship and collaborates with each patient to create a personalized treatment plan that may include medication management, therapy, and lifestyle interventions. If additional therapy is indicated, she will coordinate with other providers to ensure comprehensive care tailored to the patient’s needs.

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.

Vandana Kethini, MD

Staff Psychiatrist

Dr. Kethini is a board-certified psychiatrist in General psychiatry. She completed her medical degree at St. George's University School of Medicine in Grenada. After completing her residency at Bergen New Bridge Medical Center, she transitioned to an attending psychiatrist at the same place where she completed her residency. During her initial years as an attending, she took care of her own patients and supervised third year residents in the outpatient setting. After a few years, she transitioned to an inpatient setting, where she treated both voluntary and involuntary patients. She also continued to evaluate patients in the emergency room as part of the call group for the last 8 years. ‍Dr. Kethini is passionate about and very experienced in providing a holistic approach along with evidence-based care for patients battling depression, anxiety, bipolar disorder, OCD, ADHD, and PTSD. She integrates supportive psychotherapy along with medication management and lifestyle changes such as nutrition, exercise, sleep hygiene, and stress management. She is focused on having a collaborative approach to treatment and forming a therapeutic alliance with every single patient under her care.

Mayra Valdivia Carlisle, DO

Staff Psychiatrist

Dr. Mayra Valdivia Carlisle is a bilingual Spanish and English-speaking board-certified Adult Psychiatrist and Child & Adolescent Psychiatrist. She earned her master's degree in public health and her medical degree from Oklahoma State University Center for Health Sciences. She went on to complete her residency training in Adult Psychiatry at the University of Texas Health Science Center in San Antonio and subsequently completed her fellowship in Child and Adolescent Psychiatry. She was awarded the Excellence in Public Health Award by the U.S. Public Health Service and Surgeon General for her work addressing health disparities in healthcare. Dr. Carlisle has extensive experience in outpatient and community mental health settings.

Dr. Carlisle provides patient-centered and compassionate psychiatric care combining medication management, psychotherapeutic methods, and lifestyle modifications to create a unique treatment plan. She recognizes that each person benefits from a personalized and holistic approach to healing. Dr. Carlisle specializes in treating diverse psychiatric conditions including ADHD, anxiety disorders, depression, and post-traumatic stress disorder in children, adolescents, and adults.

During an initial visit one can expect a comprehensive evaluation aimed at understanding individual mental health history, specific concerns, and overall treatment goals. Dr. Carlisle practices a holistic approach to treating mental disorders. This is done through an individualized plan for each patient with careful consideration to medication management, therapy techniques, and lifestyle modifications. Patients can expect an empathetic and collaborative environment focused on their personal experiences and goals.

Marnie Stefan, MD

Staff Psychiatrist

Background and credentials

Dr. Stefan is a psychiatrist with extensive experience in outpatient care, inpatient care, and assertive community treatment. She has served as a medical director for large institutions, overseeing the treatment of individuals with complex mental illnesses. Born and raised in Puerto Rico, she is fluent in both English and Spanish. She earned her medical degree from the University of Puerto Rico School of Medicine and completed her psychiatry residency at the University of Florida, where she received recognition for her skills as a psychotherapist.

Treatment approach

Dr. Stefan is deeply committed to patient-centered care, adapting her role to the individual needs of each patient. She believes in treating the whole person, rather than just a diagnosis, recognizing that each patient has unique psychosocial circumstances. She has a strong foundation in psychotherapeutic interventions and is dedicated to providing engaging, compassionate, and meaningful therapy in every patient interaction. With over 10 years of experience as a psychiatrist, she has worked extensively in telemedicine since 2013, ensuring that remote care is as effective and personal as in-person visits.

What you can expect in a first visit

Patients meeting Dr. Stefan for the first time can expect a comprehensive and holistic evaluation that considers their symptoms, personal history, and life circumstances. She takes the time to build strong therapeutic relationships, fostering a caring and engaging environment where patients feel understood and supported. Whether through telemedicine or in-person care, she prioritizes personalized treatment plans that integrate medication management and psychotherapy, ensuring the highest quality of care tailored to each patient’s needs.

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.

Tiffany Reilly, LMHC

Staff Licensed Mental Health Counselor

Tiffany Reilly is a Licensed Mental Health Counselor with 8 years of experience providing therapeutic services to children, adolescents, and families in Seattle and New York City. She received her Master's in Counseling from Northwest University in 2015. Before coming to Talkiatry, Tiffany worked as a Family Therapist and Supervisor at Children's Aid. This role gave her experience navigating the complexities of adolescence, young adulthood, marriage, and other interpersonal stressors. She was also able to pursue additional trainings in motivational interviewing, trauma systems, and LGBTQIA supportive counseling. Tiffany focuses on treating mood and anxiety disorders, as well as the complexities of grief and loss. She has additional experience working with trauma, conduct disorder, ODD, and personality disorders. She utilizes a variety of therapeutic modalities including Cognitive Behavior Therapy, Psychoanalytic Theory, and Person-Centered Counseling. Tiffany approaches each therapeutic relationship with empathy and compassion, understanding the uniqueness of personal experience. She believes that all behavior maintains something for each individual and that when we bravely uncover our patterns, we can use our inherent strengths to work towards change.

Beverly Bryant, DFAACAP

Staff Psychiatrist

Dr. Bryant graduated from Mount Sinai School of Medicine to complete her adult training and the Yale Child Study Center/Riverview Hospital for Children Program to complete her fellowship in Child and Adolescent Psychiatry. A native Texan, she returned to Tyler, TX in 2020 to accept the position of Chair of the Department of Psychiatry and Behavioral Medicine at the University of Texas Health Science Center at Tyler. She also established an accredited child and adolescent psychiatry fellowship in Tyler. Prior to that, she served as the Director of the Child and Adolescent Psychiatry Division at the University of Mississippi Medical Center where she was also the Program Director of the Child and Adolescent Psychiatry Fellowship. She received her medical degree from the University of Texas Southwestern Medical School. Working with survivors of trauma has always been an important part of Dr. Bryant's practice. She currently serves as the co-chair of the American Academy of Child and Adolescent Psychiatry's Committee on Child Maltreatment and Violence and she is a representative for the National Health Collaborative on Violence and Abuse. Dr. Bryant also served as the program director of the Eating Disorders and Trauma Recovery program at Menninger Clinic in Topeka. She is board certified in adult, child and adolescent psychiatry and she has over 32 years of experience as a practicing psychiatrist. Dr. Bryant specializes in the treatment of anxiety disorders, obsessive-compulsive disorder, mood disorders, developmental disorders, Post-Traumatic Stress Disorder, Attention Deficit Hyperactivity Disorder, and family relational problems for both children and adults. She believes that "knowledge is power" and that the more a person can understand about how the brain is affected by various mental health conditions, the more treatment makes sense.

Ready to get matched?

Start our short assessment
Specialties
Anxiety
Bipolar Disorder
Depression
Obsessive-compulsive disorder (OCD)
PTSD/Trauma
Phobias
Postpartum Depression
Geriatric
States
Texas
New York
Utah
Languages
English
Takes insurance
Virtual visits
1 years experience