Theresa Colberg, MD

Dr. Arballo is board-certified psychiatrist who completed medical school at Lake Erie College of Osteopathic Medicine. He received residency training at University of Texas Health - San Antonio where in addition to clinical training 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 child, adolescent, adult, 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. Katherine Vital-Daley is an adult psychiatrist at Talkiatry. She treats all adults and her passion lies in providing accessible care for women facing challenges throughout pregnancy, childbirth, and postpartum and in reproductive psychiatry. Dr. Vital-Daley's academic background is rooted in science, with an undergraduate degree in biochemistry and molecular biology from the University of California, Merced. She then pursued her medical doctorate at the Medical University of the Americas. Following medical school, she completed her psychiatry residency training. The first two years were spent at East Carolina University, Brody School of Medicine, with a culmination of her last two years of residency at Allegheny Health Network in Pittsburgh, Pennsylvania, to further specialize in women's mental health, which solidified her expertise in this vital area.‍At Allegheny Health Network's Women's Behavioral Health clinic, Dr. Vital-Daley honed her skills in treating a range of conditions, including depression, anxiety, PTSD, OCD, bipolar disorder, and related issues, and served as a medical provider for their intensive perinatal/postpartum outpatient clinic. She also developed a deep understanding of perinatal mental health, supporting patients coping with perinatal loss and traumatic birthing experiences. In her practice, she employs supportive psychotherapy and mindfulness along with evidence-based medication management, utilizing the most current clinical guidelines and treatment modalities. ‍Dr. Vital-Daley's approach is rooted in a collaborative treatment approach. She works closely with patients, exploring past and current stressors and any relevant medical conditions to develop a comprehensive understanding of their individual needs. Recognizing the importance of cultural competency, she incorporates patients' unique backgrounds, beliefs, and core values into her care plans.

Background and credentials

Dr. Sonal Harneja is a board-certified adult psychiatrist specializing in medication management and psychotherapy for anxiety and depressive disorders. She earned her undergraduate degree from Stony Brook University and her medical degree from the University at Buffalo School of Medicine and Biomedical Sciences (now called the Jacobs School of Medicine and Biomedical Sciences). She completed her adult psychiatry residency at Montefiore Medical Center/Albert Einstein College of Medicine. Dr. Harneja has held academic appointments at New York Presbyterian/Weill Cornell Medical College and Montefiore Medical Center/Albert Einstein College of Medicine, providing collaborative and client-centered psychiatric care.

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Treatment approach

Dr. Harneja specializes in medication management and supportive psychotherapy, with a strong emphasis on promoting well-being, resilience, and mindfulness. She works closely with patients to develop individualized treatment plans, ensuring that care is collaborative and patient-centered. Follow-up visits typically last 30 minutes, during which she evaluates treatment progress and adjusts care as needed. If additional therapy is beneficial, she may recommend working with a therapist as part of a comprehensive treatment approach.

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What you can expect in a first visit

During the first visit, patients can expect a thorough psychiatric evaluation, where Dr. Harneja takes time to understand their symptoms, medical history, and treatment goals. She prioritizes open communication and trust, working collaboratively to create a personalized care plan that aligns with the patient’s mental health needs. Whether through medication management, therapy, or mindfulness techniques, she aims to foster long-term well-being and emotional resilience.

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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. Ellis is a graduate of Robert Wood Johnson Medical School in Piscataway, NJ. He completed his psychiatric residency at Cooper Hospital/University Medical Center in Camden, NJ, where he served as Chief Resident his senior year. Dr. Ellis has served as Assistant Medical Director of the community mental health center of Gloucester County for 28 years, providing care to a diverse population. Additionally, Dr. Ellis maintained a private practice for 15 years, treating individuals and their families with ongoing collaboration with therapists and other health care providers

Dr. Andrew Miller is a board-certified psychiatrist with extensive experience treating patients across Indiana. He earned his undergraduate degree in Biology with a minor in Chemistry from Indiana University, followed by his Doctorate of Medicine and residency training in psychiatry. He went on to complete a fellowship in child and adolescent psychiatry and maintains active involvement in professional organizations, including serving as past president of the Indiana Council of Child and Adolescent Psychiatry. Outside of medicine, Dr. Miller values time with his wife and two children and enjoys sports, Lego building, and supporting Indiana athletics.

Dr. Miller believes in building a collaborative therapeutic relationship grounded in respect and open communication. He strives to create a safe, supportive environment where patients of all ages—children, adolescents, and adults—feel heard and understood. He works to balance medical expertise with patient preferences, encouraging shared decision-making and honoring each individual’s goals in treatment.

Dr. Miller begins with a thorough evaluation to gain a complete understanding of each patient’s history, strengths, and challenges. From there, he develops a personalized treatment plan that may include therapy, medication management, and integration of other supportive resources. He is committed to ongoing follow-up, adjusting care as needed, and helping patients move toward lasting improvement in their mental health and overall well-being.

Dr. Earl De Guzman is a psychiatrist who values therapeutic partnership, working with patients to balance symptom relief with meaningful self-exploration. He earned his BS in Psychology from the University of California, Davis, and his MD from Ross University School of Medicine. He completed his psychiatry residency at Los Angeles County + University of Southern California Medical Center and a consultation-liaison psychiatry fellowship at Stanford University Medical Center. He is triple-board-certified in psychiatry, consultation-liaison psychiatry, and addiction medicine, and holds psychoanalytic psychotherapy training certification from the Psychoanalytic Center of California. Currently, he is a psychoanalyst-in-training at the New Center for Psychoanalysis. His expertise spans medication management, supportive therapy, and psychodynamic therapy.

Dr. De Guzman takes a collaborative, patient-centered approach, creating a warm and nonjudgmental environment. He listens deeply, asks thoughtful questions, and encourages honest exploration of symptoms and underlying patterns. He values authenticity, curiosity, and respect for each patient’s unique experiences. While symptom relief is important, his goal is to foster self-understanding and long-term growth. He works best with patients open to collaboration and motivated for change, whether through medication management, therapy, or both.

Dr. De Guzman begins with a consultation phase to ensure a good fit, listening carefully to understand each patient’s challenges and goals. Together, he and his patients build a working alliance by clarifying difficulties, identifying realistic changes, and exploring deeper patterns. When appropriate, he prescribes medication thoughtfully, aiming to support therapy rather than replace it. Each session integrates supportive and psychodynamic elements, combining medication review with therapeutic dialogue. Treatment plans are regularly revisited, allowing flexibility and growth, with the ultimate aim of empowering patients toward lasting change.