Mark Helms, MD

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

Education and training

  • University Of Arizona College Of Medicine Doctor of Medicine (MD)
  • The University of Texas Health Science Center at San Antonio (Residency)
  • The University of Texas Health Science Center at San Antonio (Fellowship)

Get to know

Mark Helms, MD

Dr. Helms is a graduate of the University of Arizona College of Medicine. He completed his General Psychiatry and Child/Adolescent fellowship training at the University of Texas, Health Science Center at San Antonio. He has over 25 years of experience as a psychiatrist treating patients of all ages (child, adolescent, and adult�including geriatric) while working in a multitude of treatment settings including outpatient clinics and psychiatric hospitals. He also has several years of experience working as a psychiatric consultant for medical-surgical hospitals, seeing an extensive variety of patients on all floors of the hospital from mother-baby to pediatrics, as well as adult patients on the medical and surgical floors. Dr. Helms takes with him into each patient encounter, his wide breadth of experience and his genuine care and concern for each and every individual patient. He provides both medication treatment and talk therapy. He understands that many patients greatly benefit from either short or long term medication treatment; however, he also understands that talk therapy can oftentimes lead to significant, long lasting positive change, personal growth, and improvements in occupational and relationship success. Moreover, patients will always find Dr. Helms encouraging and supportive as they search for greater meaning and purpose in their lives.

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Matthew Koller, MD

Staff Psychiatrist

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.

Jorge Corona, MD

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Background and credentials

Dr. Corona is a board-certified psychiatrist who earned his medical degree from the University of Texas Health Science Center in San Antonio School of Medicine. He then completed his Adult Psychiatry Residency training at UT Health San Antonio. He has extensive experience treating diverse patient populations in various clinical settings.

Treatment approach

Dr. Corona integrates medication management with therapeutic techniques and collaborates with therapists as needed to create individualized treatment plans. He is transparent in his thought process, ensuring that patients are actively involved in shaping their care. His treatment approach focuses on clarifying diagnoses and optimizing treatment modalities, considering both pharmacological and therapeutic interventions. He specializes in treating depression, anxiety, stress management, life transitions, strained relationships, trauma-related conditions, and other psychiatric challenges.

What you can expect in a first visit

During the first visit, patients can expect a detailed and comprehensive evaluation, where Dr. Corona takes the time to understand their concerns, symptoms, and personal goals. He prioritizes thorough follow-ups to assess treatment progress and refine the care plan. His collaborative approach ensures that patients feel heard and actively involved in their personalized treatment journey, with clear communication on medication management and therapy recommendations.

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.

Mark Varela,MD

Staff Psychiatrist

Dr. Mark Varela is a board-certified psychiatrist joining Talkiatry directly out of residency. He focuses primarily on medication management, often accompanied by brief cognitive, motivational, or supportive therapy. He may request that you also meet with a therapist regularly for your benefit. Dr. Varela received his medical degree and general psychiatric residency training both from Texas Tech University Health Sciences Center in West Texas. He treats young adults and adults with a wide variety of mental health concerns, including ADHD, mood disorders, anxiety, OCD, and PTSD.

Peter Szeibel, MD

Staff Psychiatrist

Dr. Peter Szeibel is board certified in adult psychiatry and has been practicing for over 36 years. His practice has focused primarily on medication management within the context of a supportive psychotherapeutic relationship. He also utilizes cognitive behavioral techniques. If the patient requires more intensive psychotherapy, Dr. Szeibel refers the patient to a therapist and collaborates with the therapist. Dr. Szeibel has experience in treating Depressive Disorders, PTSD, Panic Disorder, OCD, Bipolar Disorder, ADHD, and many other conditions. He feels his personal strengths include his inquisitiveness, scientific curiosity, and his desire to understand his patients better. Dr. Szeibel was born in Hungary, just a few months before the Hungarian Revolution against the Soviets broke out in 1956. He and his family fled under difficult circumstances and immigrated to the United States. Dr. Szeibel grew up in New York City. He attended The Bronx High School of Science, followed by Columbia University for his B.A., where he took a double major in chemistry and music. After obtaining his M.D. from S.U.N.Y in Syracuse, he returned to New York City for residency and fellowship training. During this time he won the Bendheim Fellowship Award at Cohen Children's Medical Center for his research study which examined the effects of background music on the academic performance of children with ADHD. His current areas of interest include adult ADHD, psychiatric and medical co-morbidities, and the LGBTQ population.

Andrea Hamilton, LPC

Staff Therapist

Andrea Hamilton, LMHC, MBA is a Licensed Mental Health Counselor with over 20 years of experience providing compassionate and effective therapeutic care to individuals, families, and groups. Throughout her career, she has worked across diverse settings, including educational institutions, foster care systems, group homes, government agencies, and healthcare organizations. This extensive background has equipped her to address a wide range of mental health challenges, including anxiety, depression, trauma, relationship issues, and life transitions.

She holds a Master of Education and an MBA from Florida Atlantic University, along with a Bachelor of Science in Psychology with a minor in Criminal Justice. She is CFARS Certified, and a Qualified Supervisor in the State of Florida. Her commitment to professional growth is evident in her numerous certifications and specialized training in ethics, trauma processing, domestic violence, and online counseling.

In addition to her clinical expertise, Andrea Hamilton has served as an adjunct professor and leader in clinical operations, further demonstrating her dedication. She is committed to delivering accessible, high-quality care tailored to the unique needs of her clients.

Derek Miller, LCSW

Staff Therapist

Derek Miller is a Licensed Clinical Social Worker, who has extensive experience working in the fields of substance abuse and mental health. Derek has worked with clients with a large variety of concerns and backgrounds, with more experience with male and minority populations. Derek attended undergraduate school in Alfred, NY, graduate school in Rochester, NY, including a school-based visit to Estonia to learn about social work systems abroad. Derek's greatest passion is helping people make lasting change in their lives. His approach draws both on professional and personal experiences with addiction, trauma, first responders, relationships and more. By creating a space and relationship where you feel safe, valued, and respected, Derek works together with you to overcome the challenges of today and build resiliency for the challenges yet to come. Therapy can be a truly transformative experience, when it is built on human connection and dedication to change. Derek takes an active approach, which includes asking tough questions while staying respectful, as well as humor and friendly conversations when appropriate. Therapy begins with building trust and a good relationship. Derek utilizes experiences from various practice models, including Cognitive Processing Therapy, Solution Focused Therapy and Motivational Interviewing.

Peter Szeibel, MD

Staff Psychiatrist

Dr. Peter Szeibel is board certified in adult psychiatry and has been practicing for over 36 years. His practice has focused primarily on medication management within the context of a supportive psychotherapeutic relationship. He also utilizes cognitive behavioral techniques. If the patient requires more intensive psychotherapy, Dr. Szeibel refers the patient to a therapist and collaborates with the therapist. Dr. Szeibel has experience in treating Depressive Disorders, PTSD, Panic Disorder, OCD, Bipolar Disorder, ADHD, and many other conditions. He feels his personal strengths include his inquisitiveness, scientific curiosity, and his desire to understand his patients better. Dr. Szeibel was born in Hungary, just a few months before the Hungarian Revolution against the Soviets broke out in 1956. He and his family fled under difficult circumstances and immigrated to the United States. Dr. Szeibel grew up in New York City. He attended The Bronx High School of Science, followed by Columbia University for his B.A., where he took a double major in chemistry and music. After obtaining his M.D. from S.U.N.Y in Syracuse, he returned to New York City for residency and fellowship training. During this time he won the Bendheim Fellowship Award at Cohen Children's Medical Center for his research study which examined the effects of background music on the academic performance of children with ADHD. His current areas of interest include adult ADHD, psychiatric and medical co-morbidities, and the LGBTQ population.

Leah Clary, LPC

Staff Licensed Professional Counselor

Leah E. Clary is a Licensed Professional counselor at Talkiatry. She has years of experience working with individuals of all ages from childhood to older adults. Leah E. Clary utilizes an eclectic counseling style. She understands that each and every person is unique and has individual needs, and is willing to adapt to what would benefit the individual. Leah believes that coordinating with all providers is important to achieving successful therapeutic experiences for the length of the engagement. After receiving her master's degree from Liberty University, Leah participated in an internship in Philadelphia working with first responders for crisis debriefing. While participating in this program, Leah also actively worked as an older adult protective services investigator within the city limits. In order to achieve her goal of becoming an LPC, Leah began working with families in a community-based program focusing on relational components. In this program, Leah worked with therapists of different backgrounds, building on her knowledge of communication techniques and team-based therapy, and even training new team members as needed. Throughout her professional career, Leah has worked with individuals with various diagnosed and undiagnosed conditions and adapted to their individual needs. Her passion is to assist the underserved demographic of individuals working through infertility issues and processing the idea of adoption.

Ronald Moruzzi, DO

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Dr. Moruzzi is board certified and completed his residency at Tripler Army Medical Center in 2000. He served as an Army Psychiatrist for a total of 24 years providing specialty care to active duty service members and their families. During this time, he has served in multiple roles, including but not limited to section leader, service chief, consultant, and department chiefs at multiple duty stations. He also served as the senior psychiatrist and officer in charge for two combat deployments in 2002-2003 and 2009-2010. He specializes in treating Mood, Anxiety, PTSD, and Sleep disorders. Throughout his 28-year career, Dr Moruzzi has remained actively involved in teaching psychiatry residents, psychiatric nurse practitioners, physician assistants, and medical students. Dr. Moruzzi retired from the Army in the summer of 2020 and for the past 4 years has been working as a staff psychiatrist at Northern Arizona University (NAU). Here he provided specialty care to NAU undergraduate and graduate students as well as to faculty, staff, and their family members. He provides supportive and educational therapy and as needed will utilize lifestyle skills integration (i.e. sleep, outdoor time…) to help patients reduce their primary stressors. He believes in taking a holistic approach to leverage non-medication interventions along with medication management to obtain the best outcome for his patients.

Maria Lourdes Castineira Garcia, MD

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Dr. Castineira Garcia is a highly experienced, board-certified psychiatrist specializing in adult and addiction psychiatry, with nearly 20 years of clinical experience in both English and Spanish. Originally from Galicia, Spain, she earned her medical degree from the Facultad de Medicina y Odontología in Santiago de Compostela. After several years as a primary care physician in her home region, she moved to the United States, where she was able to pursue her true passion: psychiatry. Dr. Castineira Garcia has provided high-quality care to culturally diverse communities, working in public sector, non-profit, and for-profit organizations. She has extensive experience helping patients with depression, anxiety, PTSD, and various other mental health conditions.‍Taking a personalized approach to treatment, Dr. Castineira Garcia considers the unique psychology, biology, and lifestyle of each individual when determining the best course of action. Her practice focuses on medication management in conjunction with supportive therapy, conducting follow-up visits in 30-minute increments. She believes that the most successful treatments integrate physical health, therapy, mindfulness, and medication�when necessary�to provide the most effective solutions for her If you are looking for a compassionate and experienced psychiatrist who is fluent in both English and Spanish, Dr. Castineira Garcia is an excellent choice for those seeking to improve their mental health patients.

Pressley Warrick, MD

Staff Psychiatrist

Dr. Pressley Warrick is a double board-certified psychiatrist specializing in general psychiatry and child and adolescent psychiatry. Dr. Warrick currently practices full-time, offering comprehensive psychiatric care to children, adolescents, and adults. She previously established and led a Behavioral Health Clinic integrated within a Family Medicine Practice. Prior to this role, Dr. Warrick provided dedicated psychiatric care at a private psychiatry practice for over a decade.

Dr. Warrick earned her medical degree from the Medical University of South Carolina, completed residency training at Baylor College of Medicine's Menninger Department of Psychiatry and Behavioral Sciences, and pursued additional specialization through a Child and Adolescent Psychiatry fellowship at Palmetto Health/USC School of Medicine.

Known for a collaborative and holistic treatment approach, Dr. Warrick emphasizes individualized care and evidence-based practices to support patients’ mental wellness. Her professional excellence has earned recognition as Sumter’s Best Psychiatrist for consecutive years.

Dr. Warrick’s preferred treatment modalities include medication management, psychodynamic psychotherapy, and supportive psychotherapy. She specializes in treating depression, anxiety, ADHD, autism, OCD, bipolar disorder, and PTSD. Her typical approach for new patients involves taking a detailed patient history, establishing rapport, and setting clear treatment goals in partnership with her patients.

Megan Crochet, MD

Staff Psychiatrist

Dr. Megan Crochet is board certified in Adult Psychiatry and has completed a fellowship in child and adolescent Psychiatry. Dr. Crochet attended medical school at Drexel University College of Medicine and completed her training at Mount Sinai School of Medicine, followed by Tulane University School of Medicine, where she was a chief resident. Dr. Crochet provides a therapeutic medication management visit, which incorporates therapeutic techniques tailored to the individual patient needs while adjusting medication doses. Her goal is to help patients manage their symptoms while working towards, over time, uncovering the root causes. This comprehensive process helps to empower her patients and provides hope and acceptance of their psychiatric challenges. If indicated, Dr. Crochet may believe that additional therapy is also needed and recommend that you bring a therapist into your care team to provide the best outcome. Dr. Crochet has worked in hospital systems, private practice, and most recently telemedicine. When not practicing, she enjoys all things water, cooking and spending time with her daughter and dog.

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