Maria Mann, MD

Grace is a LCSW, and LISW-CP licensed in Florida, North Carolina, and South Carolina. She holds a Bachelor of Science in Family and Consumer Sciences with a specialization in Nutrition from Solusi University in Zimbabwe and a Master of Social Work in Clinical Practice from Andrews University in Berrien Springs, MI. Grace has 20 years of experience providing mental health and psychotherapy services to diverse populations in various settings, including telehealth, outpatient care, residential programs for youth and adults, Assertive Community Treatment, foster care, inpatient units, intensive in-home services, and private practice. Her approach is individualized, solution-focused, holistic, and goal-oriented, emphasizing clients' strengths and fostering a positive, affirming perspective. Grace specializes in treating individuals facing anxiety, depression, trauma, low self-esteem, mood instability, anger, unresolved emotional challenges, relationship difficulties, and life transitions. She works with adults, couples, and families. Grace's therapeutic techniques include counseling for emotional and personal growth, fostering purpose and meaning, and empowering self-esteem. Grace draws on evidence-based practices tailored to each client's needs, including Trauma-Informed Care, CBT, Trauma-Focused CBT, Motivational Interviewing, Collaborative Problem Solving, Positive Behavior Support, and Family Systems approaches.

Dr. Zac Keller, DO, DABPN (he/his), is a board-certified psychiatrist with experience across inpatient and outpatient settings. He has held leadership roles including Interim Medical Director and Director at Richard Young Hospital, where he also created and led the hospital’s ECT program. Dr. Keller’s clinical focus includes ADHD, PTSD, and personality disorders, and he brings an integrative lens to psychiatric care.

Dr. Keller takes a collaborative, supportive, and evidence-based approach to treatment. He values confidentiality, culturally sensitive care, and trauma-informed practice. Known for his warm yet direct communication style, he works to create a respectful, nonjudgmental environment where patients feel heard, understood, and actively involved in their care.

Care begins with a comprehensive intake that explores medical, psychiatric, social, and functional aspects of a patient’s life. Session length and frequency are tailored to individual needs. Treatment plans are developed collaboratively and may include medication management combined with talk therapy and other evidence-based interventions. Progress is reviewed regularly and adjusted based on ongoing dialogue.

Dr. Shari Sengupta attended the University of OK as a National Merit Scholar and went on to graduate with her MD from Eastern Virginia Medical School. She specialized in Adult Psychiatry at the University of NC Hospitals where she was a chief resident. She received psychotherapy training in insight-oriented and cognitive-behavioral approaches and trained at the Psychoanalytic Institute of the Carolinas. She has 18 years of experience providing medication management and psychotherapy in both private practice and community mental health settings and over 10 years of experience in telepsychiatry providing care to underserved communities. Dr. Sengupta has experience treating a variety of mental health concerns but has a particular interest in depression, anxiety, and mental health in the perinatal period. Her practice focuses on medication management from a holistic perspective. She believes that mental health is the cornerstone of overall well-being and that treatment is a collaborative journey toward improved health and function in life, work, and relationships. She offers culturally sensitive treatment to people from all backgrounds and sexual orientations. As a staff psychiatrist at Talkiatry, her treatment approach focuses on medication management informed by a background in psychotherapy.‍

Background and credentials

Dr. Agarwal is a board-certified adult psychiatrist. He obtained his bachelor's degree in Biological Sciences from the University of California at Irvine and graduated cum laude with his medical degree from the American University of Antigua. Dr. Agarwal completed his psychiatry residency training at the University of Central Florida, where he was elected chief resident.

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Treatment approach

Dr. Agarwal employs a collaborative and patient-centered approach, primarily focusing on medication management in combination with supportive therapy. He is a strong advocate of psychoeducation, believing it to be an integral part of effective psychiatric care. Dr. Agarwal specializes in treating adults experiencing depression, anxiety, PTSD, and insomnia. He is also experienced in managing patients with psychiatric conditions complicated by medical comorbidities such as obesity, hypertension, chronic pain, and diabetes.

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What you can expect in a first visit

Patients visiting Dr. Agarwal for the first time can anticipate a comprehensive evaluation conducted in a collaborative and supportive environment. Dr. Agarwal prioritizes understanding each patient's individual needs and concerns, creating a personalized treatment plan that integrates medication, supportive therapy, and psychoeducation. Follow-up visits typically last about 30 minutes, allowing time to adjust treatment and reinforce therapeutic strategies.

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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. Rachel Sherhart is a board-certified adult psychiatrist who has been in practice for over 4 years. She specializes in medication management with 30-minute follow-up visits. This may be accompanied by elements of supportive therapy, Acceptance and Commitment Therapy (ACT), Dialectical Behavior Therapy (DBT), and psychodynamic therapy. If more in-depth work is needed, she may refer patients to a collaborating psychotherapist. ‍Dr. Sherhart received her medical degree from Texas A&M Health Science Center and completed her psychiatry residency training at the University of Texas Southwestern in Dallas, Texas. She has served as faculty at Texas A&M University College of Medicine, providing education and supervision for psychiatry residents and medical students. ‍She has experience treating adult patients from many walks of life with a broad range of diagnoses, including depression, anxiety, bipolar disorder, ADHD, and trauma-related disorders. Dr. Sherhart has a passion for providing excellent patient care and education. Her goal is for patients to feel heard and find a safe place to discuss their concerns. She is motivated to work collaboratively with patients to find a solution that best fits their treatment goals and improves their overall quality of life.‍

Dr. Mary Lou Gutierrez is board-certified in both Child & Adolescent Psychiatry and General Psychiatry, with over 20 years of clinical experience. She earned her M.D. from Loyola University Medical Center, where she also completed her residency in Adult Psychiatry. She pursued fellowship training in Child and Adolescent Psychiatry at Northwestern University’s Children’s Memorial Hospital. Her past roles include Medical Director for Compass Health Center’s Under 18 Program and Attending Psychiatrist at Loyola. She has been recognized as a “Top Doctor” in Child and Adolescent Psychiatry by US News and World Report and Negocios Now.

Dr. Gutierrez fosters a warm, collaborative environment where patients and families feel supported and understood. She emphasizes open communication and works closely with patients to define meaningful, realistic treatment goals. Her holistic, family-centered approach integrates medication management, therapy, and psychoeducation with a deep commitment to cultural sensitivity and compassionate care.

Dr. Gutierrez begins by learning each patient’s personal story, clinical history, and goals through a comprehensive evaluation. She creates individualized, evidence-based treatment plans tailored to each child’s unique needs and family context. She continuously collaborates with patients, families, and care teams to ensure treatment remains effective, combining psychotherapy, medication management, and coordination with other providers and resources.