Sarah Debrey, MD

Alanna Montalvan is a Board-Certified Psychiatric Mental Health Nurse Practitioner (PMHNP) with over 15 years of nursing experience, including 10+ years as a PMHNP. She has supported individuals with anxiety, depression, ADHD, trauma-related disorders, bipolar disorder, and chronic mental health needs across outpatient, inpatient, and psychiatric emergency settings. Alanna holds a Master of Science in Nursing from Hunter College with a PMHNP concentration and is expanding her clinical expertise through Family Nurse Practitioner training. She values patient-centered care and multidisciplinary collaboration.

Alanna prioritizes creating a warm, non-judgmental space where patients feel heard, respected, and supported. She takes a collaborative approach, partnering with patients to identify goals, explore treatment options, and build long-term wellness strategies. Open communication, transparency, and a holistic perspective that integrates emotional and physical health guide her practice. Patients can expect thoughtful, evidence-based care that considers life stressors, identity, family dynamics, and wellness behaviors.

Alanna begins with a comprehensive assessment to understand each patient’s history, concerns, strengths, and goals. She develops individualized treatment plans, including medication management, psychotherapy-informed strategies, lifestyle recommendations, and coordination with other providers as needed. Treatment goals are regularly revisited to ensure care evolves with the patient. She emphasizes empowerment and education, helping patients feel confident and informed throughout their mental health journey.

Dr. Zezetko completed her medical training at the University of Georgia/August University Medical Partnership. While in medical school, she received a Master of Business Administration at the University of Georgia. She then moved to North Carolina to complete her psychiatric residency training at the Brody School of Medicine/ECU Health Medical Center. During her training, she gained extensive clinical experience in working with adults and veterans in psychiatric inpatient, outpatient, and emergency settings. She also served as a chief resident of the psychiatry program and published several case studies.

Dr. Zezetko relies on evidence-based treatments to guide pharmacotherapy decisions. In addition to medication management, she also incorporates supportive psychotherapy and psychodynamic psychotherapy techniques in her visits with her patients. When appropriate, Dr. Zezetko will refer patients for further psychotherapy and collaborate with therapists to provide more comprehensive care. Dr. Zezetko takes great pride in forming meaningful connections with her patients and listening to their concerns.

Dr. Zezetko will conduct a comprehensive psychiatric evaluation and take time to understand patients’ individual concerns, mental health goals, and history. Dr. Zezetko believes in building a strong therapeutic relationship that empowers patients to join in a collaborative discussion for optimizing their individual treatment plans and reaching their defined goals.

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Dr. Rodriguez is a board-certified adult psychiatrist. He earned his medical degree from the David Geffen School of Medicine at UCLA and completed his residency at the University of Southern California. Dr. Rodriguez has experience working in a variety of settings, including inpatient, outpatient, community mental health, and correctional facilities.

Dr. Rodriguez specializes in treating depression and anxiety. He acknowledges that while medications can be necessary, they are not magic, and a holistic approach is essential for achieving mental health. With this understanding, Dr. Rodriguez spends time getting to know his patients, focusing on helping them achieve mental wellness rather than simply prescribing medications. When he became a doctor, he made a pledge to "do no harm." He takes this commitment seriously and only prescribes medications, especially those with addictive properties, when it is safe and clearly indicated.

The first one or two appointments focus on a thorough assessment to establish a provisional diagnosis, which is essential for effective treatment planning. Once this initial diagnosis is made, Dr. Rodriguez collaborates with his patients to develop tailored treatment recommendations. During follow-up appointments, he actively listens to his patients and proposes adjustments to the treatment plan as needed.

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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Shannon McElhone is a Licensed Mental Health Counselor in New York and Massachusetts. She has over ten years' experience working in the mental health field. Shannon has experience working with children, adolescents, and adults seeking assistance in managing their experiences with depression/mood challenges, anxiety, life transitions, self-esteem, trauma, attention focus, and relationship issues. Shannon utilizes humanistic, person-centered, collaborative, strength based, cognitive behavioral, mindfulness based, solution focused and emotionally focused approaches to therapy while maintaining an open, flexible, creative atmosphere to remain aware of the unique and individual needs of each client. Shannon seeks to create a non-judgmental and safe environment where a caring relationship can be built with her clients to utilize and add to their strengths. Through her practice, a collaboration can bring her clients towards achieving their goals and living the life they desire. Shannon completed her Bachelor of Arts in Human Relations from St. Joseph's College and received her Master of Science in School Counseling and Extended Master of Science in Clinical Mental Health Counseling from Long Island University. Shannon's years of experience include working as a Rehabilitation specialist/therapist at a Pros program, a psychotherapist at an outpatient clinic, a Child and Youth Behavioral Military Family Life counselor working with children and families on a Military base in New York. More recently, Shannon has held a role as a psychotherapist on an online platform that provides virtual therapy and continues to engage in this role at Talkiatry. Shannon's specialties include: Depression, Anxiety, OCD- Obsessive Compulsive Disorder, ADHD, Trauma, Grief & Loss, Stress management, Life transitions, Self-esteem issues and Relationship issues.

Dr. Jessica Grimes is a board-eligible child and adolescent and adult psychiatrist. She is originally from Sylva, NC. She earned a bachelor's degree in religion and minored in biology at The University of the South in Sewanee, TN. She graduated cum laude and was inducted into the order of the gownsmen, an honor society. She earned her doctorate from the West Virginia School of Osteopathic Medicine in Lewisburg, WV. Dr. Grimes completed a traditional rotating internship through WVSOM at Our Lady of Bellefonte Hospital in Ashland, KY and completed residency training in psychiatry at Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania. While in residency, she earned a master's degree in medical education from LECOM. She completed a fellowship in child and adolescent psychiatry at the University of South Carolina School of Medicine, Greenville. During her second year of fellowship at USC-Greenville, she received the "Child & Adolescent Psychiatry Fellow of the Year� award.