Michael Underriner, MD

Michael Robbins is a psychiatric nurse practitioner with over 17 years of experience specializing in psychiatric medication management. He earned his MSN from the University of Tennessee in 2006. His career spans various settings, including acute inpatient care, private practice, community mental health, and substance abuse treatment. Michael treats conditions such as depression, anxiety, PTSD, OCD, bipolar disorder, and ADHD. He has worked both remotely and in-person, adapting to the evolving healthcare landscape. Michael is known for his expertise in psychopharmacology, tailoring treatment plans to each patient’s needs while minimizing side effects. His compassionate and patient-centered approach has made him a trusted provider in the mental health community.

Dr. Patricia de la Cabada earned her medical degree from Ross University School of Medicine and completed her psychiatry residency at the University of Central Florida/HCA Consortium in Gainesville, where she served as outpatient chief resident and received the Excellence in Psychotherapy award. She holds a bachelor’s degree in Anthropology from the University of Florida and has experience in outpatient, inpatient, and consult-liaison psychiatry. Dr. de la Cabada is fluent in Spanish and has special interests in OCD, depression, perinatal depression, bipolar disorder, anxiety, and PTSD.

Dr. de la Cabada approaches care with empathy and compassion, creating a warm, supportive environment. She values strong therapeutic relationships and uses a holistic lens that considers lifestyle and psychosocial factors. Her collaborative, patient-centered style focuses on creating personalized treatment plans.

She begins with a thorough history and discussion of concerns and goals. Treatment plans include medication management, supportive therapy, and lifestyle strategies, with follow-up visits to monitor progress and adapt care as needed.

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. Troy Grantham is a board-certified staff psychiatrist who treats adult patients. A former engineer, Dr. Grantham has developed a passion for guiding patients along the road to recovery. He completed his undergraduate studies at The University of Texas at Austin and later completed medical school and residency in General Psychiatry at The University of Texas Medical Branch at Galveston. Dr. Grantham's practice focuses on medication management. He utilizes a systematic approach to ensure diagnoses are accurate and treatment plans are optimized to each individual patient. His approach is also holistic in nature, often incorporating therapy and lifestyle modification into the treatment plan. Dr. Grantham employs multiple therapeutic approaches in his practice depending on the needs of the patient including supportive therapy, Cognitive Behavioral Therapy (CBT), and Acceptance and Commitment Therapy (ACT). He places great emphasis on psychoeducation so that patients are aware of the nature and prognosis of their conditions as well as the treatment options available. When multiple treatment options are reasonable, Dr. Grantham takes patient preference into account, offering flexibility to the patient experience. He treats a variety of psychiatric disorders with a particular focus on mood disorders, anxiety disorders, obsessive-compulsive disorders, and trauma-related disorders. Please note: Dr. Grantham does not prescribe long-term, daily benzodiazepine medications, however, he is happy to help you taper off of these medications and transition to a safer, long-term medication regimen. In addition, Dr. Grantham does not treat ADHD nor prescribe stimulant medications.

Background and credentials

Dr. Vansickle is a board-certified adult psychiatrist with over 25 years of clinical experience. She earned her medical degree from the University of Texas Health Sciences Center San Antonio and completed her internship at UAB. She then completed her psychiatry residency at the University of Louisville Hospital, where she served as chief resident and received a national award in community psychiatry. Throughout her career, she has worked in both inpatient and outpatient settings as a staff psychiatrist, primarily in Texas and Alabama.

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Treatment approach

Dr. Vansickle places a strong emphasis on establishing trust and building therapeutic relationships to help patients achieve their goals. Her practice focuses on medication management, often combined with supportive or emotionally focused therapy during 30-minute follow-up visits. If she believes additional therapy would be beneficial, she may recommend that patients work with a therapist as part of their care team. She has extensive experience treating patients in various settings, including community mental health centers, VAMC-affiliated clinics, and hospital-based psychiatric units. She also has expertise in psychiatric consultations for medically ill patients, as well as guardianship and competency evaluations.

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What you can expect in a first visit

Patients can expect a thorough initial evaluation, where Dr. Vansickle takes the time to understand their symptoms, history, and treatment goals. She provides a structured yet compassionate approach to care, ensuring that each patient feels heard and supported. Follow-up visits typically last 30 minutes, during which she monitors progress and adjusts treatment as necessary. If additional therapy is needed, she collaborates with therapists to ensure comprehensive care tailored to each patient’s needs.

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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. Dhaliwal is an integrative psychiatrist with an MPH, a 1-year fellowship through Psychiatry Redefined, as well in intensive inpatient and outpatient training. A Boston University School of Medicine graduate and former Chief Resident at FAU, she blends research-based care, emotional insight, and life optimization. She treats depression, bipolar, anxiety, ADHD, PTSD, substance use, and psychotic-spectrum disorders with a holistic, results-driven approach.

Dr. Dhaliwal works with individuals who feel stuck—functioning on the outside but "not like myself" inside. Her warm, structured, and research-driven approach combines medication when needed with integrative tools such as CBT, lifestyle changes, "24-hour approach", and a bio-psycho-social-spiritual lens. She focuses on root causes and helps individuals gain clarity, momentum, and purpose to function at their highest level across home, career, and life.

Dr. Dhaliwal begins with a 360-degree assessment exploring emotional patterns, routine, physical health, neurobiology, and values. Her 24-hour optimization model supports intentional living, clarity, and structure. She fine-tunes medications and augments with an integrative tools to enhance mood, resilience, and wellbeing. Her care is shaped by years in psychiatry and over a decade of coaching future physicians, researchers, and life coaches to reach their highest academic and career potential.