Susannah Williams, MD

Dr. Jessica Marz is a board-certified psychiatrist who completed her undergraduate studies at the University of Florida and earned her medical degree from the Florida State University College of Medicine. She went on to complete her psychiatry residency at the University of Florida College of Medicine Jacksonville. Dr. Marz treats adults experiencing a variety of mental health concerns, including anxiety, depression, PTSD, OCD, ADHD, bipolar disorder, and adjustment-related challenges.

Dr. Marz is a compassionate and thoughtful psychiatrist committed to holistic, patient-centered, evidence-based care. She approaches each individual with warmth and without judgment, fostering a therapeutic environment built on open communication and trust. She believes that strong rapport is essential to achieving meaningful progress in treatment.

Dr. Marz combines medication management with supportive psychotherapy, incorporating cognitive-behavioral techniques and motivational interviewing. She customizes each treatment plan to align with the patient’s personal goals and evolving needs, recognizing that healing is a highly individualized journey.

Dr. Vargas is an adult psychiatrist who received her medical degree from the University of Texas Health Science Center of San Antonio. She subsequently completed her psychiatry residency training at UT Health San Antonio.

Dr. Vargas has a patient-centered and thorough approach to treatment. She has experience treating a broad spectrum of mental health disorders, with particular interest in depression, anxiety, and post-traumatic stress disorder. She has also worked in clinic with severely mentally ill patients at the South Texas VA in San Antonio.

Dr. Vargas's primary focus is medication management with an emphasis on shared decision-making; however, she frequently also utilizes supportive therapy, cognitive behavioral therapy, and psychodynamic therapy principles in her approach. She may refer patients to a therapist if further support would be beneficial.

‍

Dr. Michael Gravenstein earned his medical degree from the University of Florida College of Medicine, where he also completed his psychiatry residency. During training, he was recognized with multiple awards, including the Malcom Randall VA Resident of the Year Award, the Ross A. McElroy Psychotherapy Award, and the John “J.D.” Dorian Award for best sense of humor. He has worked across outpatient, inpatient, and consult liaison settings, and has experience treating a wide range of conditions including depression, anxiety, ADHD, OCD, personality disorders, and transitional age concerns. He also has expertise working with LGBTQIA+ patients and provides psychodynamic, CBT, and supportive therapies.

Dr. Gravenstein believes in a comprehensive approach to treatment that integrates medications, therapy, and lifestyle interventions. While medications can be very effective, he views them as just one part of a broader treatment plan tailored to each patient’s needs. He emphasizes individualized care and sees treatment as a team effort, meeting patients where they are and progressing at a pace they feel ready for.

Dr. Gravenstein strives to create a warm, collaborative environment that fosters open communication and genuine connection. He may challenge patients therapeutically but always with careful attention to their readiness and comfort. His goal is to build trust so that meaningful conversations and progress can occur. For him, success is always shared—when patients succeed, they succeed together; when challenges arise, they regroup and move forward together.

Background and credentials

Dr. Robert Whelpley, M.D., is board-certified in both Child and Adolescent Psychiatry and Adult Psychiatry. He completed his undergraduate studies at Binghamton University and earned his medical degree from Upstate Medical University in Syracuse, New York. He then went on to complete his residency and fellowship training at the University of Rochester. Throughout his career, he has worked with patients and families across the lifespan in inpatient, outpatient, and emergency psychiatric settings.

‍

Treatment approach

Dr. Whelpley believes in collaborative care, working closely with treatment providers, patients, and families to ensure that mental health concerns are addressed as a team. His approach integrates talk therapy techniques, including motivational interviewing, cognitive-behavioral therapy (CBT), mindfulness, and supportive psychotherapy, alongside medication management. He customizes treatment to maximize each patient’s mental health and overall wellness, sometimes incorporating a therapist into the care plan when beneficial.

‍

What you can expect in a first visit

During the first visit, patients can expect a comprehensive evaluation where Dr. Whelpley takes time to understand their symptoms, background, and treatment goals. His approach is patient-centered and team-oriented, ensuring that care is personalized and collaborative. He works with patients to develop a treatment plan that balances medication management with therapeutic interventions, fostering long-term mental wellness.

‍

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.

‍

Zakiyyah Weatherspoon is a dual-certified Family Nurse Practitioner and Psychiatric Mental Health Nurse Practitioner with over a decade of experience. Since 2011, she has worked in family medicine, and since 2013, she has focused on mental health care across the lifespan. Her background includes treating children, teens and adults in hospitals, private practices, and community settings.

Since 2017, Weatherspoon specialized in helping individuals manage depression, anxiety, bipolar disorder, OCD, PTSD, ADHD, ODD, eating disorders, and substance use. She uses supportive therapy, solution-focused therapy, and cognitive behavioral therapy to help clients feel heard, understood, and empowered.

Weatherspoon is passionate about breaking the stigma around mental health. She encourages her clients to speak up, get help, and take control of their mental wellness. Her approach is based on the Mental Health Recovery Model, which focuses on hope, healing, and building a life beyond diagnosis.

‍

Dr. Moskowitz (she/her) is a board certified adult psychiatrist. She earned her medical degree from Albert Einstein College of Medicine and completed her psychiatry residency at the University of Arizona. She has extensive experience treating a wide range of mental health conditions, including depression, anxiety, ADHD, bipolar disorder, PTSD, OCD, and psychotic disorders. Dr. Moskowitz is especially passionate about working with transgender and other LGBTQ+ patients, offering inclusive, identity-affirming care tailored to each individual’s experience and needs.

Dr. Moskowitz takes a warm, collaborative approach grounded in empathy and trust. She believes in meeting patients where they are and working together to build a therapeutic relationship that supports healing, self-understanding, and personal growth. Patients can expect a nonjudgmental, respectful environment where their goals and concerns are genuinely heard and addressed.

Dr. Moskowitz integrates elements of psychodynamic, supportive, and cognitive-behavioral therapy into her work and offers medication management when appropriate. She emphasizes a personalized treatment plan for each patient, designed to align with their unique values, history, and goals. Her process includes thorough assessment, open dialogue, and flexible adjustments as needs evolve over time.

‍