Thomas Mullenix, MD

Lisa Mazzotti is a Licensed Professional Counselor in Colorado, and a Licensed Mental Health Counselor and Certified Addiction Professional in Florida. She earned her bachelor’s in Psychology and a master’s in Human Development Counseling from the University of Illinois. With more than 30 years of clinical experience, she has worked with adolescents, adults, and older adults in individual, couple, family, and group settings. Lisa also served as an adjunct professor, teaching psychology and sociology courses for over a decade in high schools, colleges, and correctional facilities. Her extensive background includes treating addictions, trauma, mood and anxiety disorders, OCD, ADHD, self-harm, and eating disorders.

Lisa meets each person where they are, creating a safe space where clients feel heard, valued, and respected. She emphasizes open communication, collaboration, and mutual trust, encouraging patients to share what feels most comfortable and meaningful to them. Lisa’s goal is to empower clients to identify and pursue their personal goals at their own pace, fostering lasting growth. She brings compassion, positivity, experience, and humor to her sessions, reminding patients that change begins with understanding and acceptance.

Lisa tailors her approach by exploring each patient’s history, strengths, and priorities to create an individualized treatment plan. Drawing on Acceptance and Commitment Therapy (ACT), Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), Rational Emotive Behavior Therapy (REBT), Mindfulness, Motivational Interviewing, and Solution-Focused Therapy, she adapts her methods to meet each client’s needs. Lisa has facilitated Intensive Outpatient (IOP), Partial Hospitalization (PHP), and inpatient group therapy for co-occurring disorders. She supports clients with a broad range of concerns, including anxiety, depression, PTSD, grief, self-harm, abuse, and both physical and psychological addictions.

Dr. Steven Mathew is a trained adult and child and adolescent psychiatrist. He recently completed his child and adolescent psychiatry fellowship at the University of Miami/Jackson Health System, where he served as chief fellow. He completed his general psychiatry residency at Pine Rest Christian Mental Health Services in Grand Rapids, Michigan. Dr. Mathew earned his Doctor of Osteopathic Medicine from the Philadelphia College of Osteopathic Medicine’s Georgia campus, a satellite campus located in the Atlanta metro area. He graduated from the University of Georgia with a Bachelor of Science in Biology and afterwards obtained a Master of Public Health in Health Policy and Management.

Dr. Mathew has had extensive clinical experiences caring for patients across the lifespan in specialty inpatient units, partial hospitalization programs, emergency psychiatry, outpatient clinics, consult liaison psychiatry, and telemedicine. He has clinical expertise in treating depression, anxiety, trauma, OCD, ADHD, and tic disorders.

Dr. Mathew's treatment approach combines evidence-based medication management with supportive therapy, emphasizing empathy, collaboration, and goal-oriented care tailored to each patient and family.

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Mary Birse is a board-certified Psychiatric Mental Health Nurse Practitioner (ANCC) with over 20 years of nursing experience. She graduated magna cum laude with a BSN from Florida Atlantic University and earned her MSN from the University of Florida. She completed a Psychiatric NP Residency at the VA in Charleston, SC. Mary has worked in a variety of settings including the West Palm Beach VA Medical Center, the Palm Beach County Firefighter’s Clinic, various outpatient telehealth platforms, and a child and adolescent inpatient facility. She was also an adjunct professor at Palm Beach State College.

Mary believes in empowering patients through education and collaboration so they can play an active role in their mental health journey. She works to create a warm and welcoming space where patients feel safe, heard, and understood. Whether the treatment path includes therapy, medication, integrative approaches, or a combination, she ensures that the plan reflects the patient's needs and goals.

Mary takes a thorough and holistic approach to care. She spends time understanding each patient’s history and past treatments—what has or hasn’t worked—and listens carefully to their current concerns and future goals. By factoring in lifestyle and preferences, she works with patients to build thoughtful, individualized treatment plans.

Dr. Tanvi Gupta, a native Marylander who recently finished her fellowship training in Child and Adolescent Psychiatry from the University of Maryland. She completed her residency in general psychiatry from San Antonio, Texas and is a Board Certified Psychiatrist. Prior to training, Dr. Gupta attended medical school at Touro College of Osteopathic Medicine in in New York. She also holds a master's in biomedical science from Rutgers University in New Jersey and a bachelor's in public health from the University of Maryland. She is on the Early Career Psychiatrist Committee for the Child and Adolescent Psychiatrists of Greater Washington Area. Dr. Gupta has worked in various settings, ranging from academic centers, schools, state hospitals and residential treatment centers. She also provided medication management and therapy to Medicaid patients in an outpatient setting, delivering care to children and adolescents with various mental health disorders. Dr. Gupta has experience in Emergency Psychiatry as well.

Dr. Gupta greatly values connecting with her patients. She is gentle yet direct in her approach. She uses a shared decision-making process to design a treatment plan that align with her patient’s goals. Dr. Gupta provides psycho education for diagnoses and medication recommendations. She has a special interest in ADHD and trauma. She appreciates a family-based approach.

Dr. Gupta uses a comprehensive biopsychosocial evaluation, psychotherapy and medication management to treat a variety of mood disorders, anxiety disorders, as well as ADHD. Dr. Gupta promotes non-pharmaceutical interventions, when appropriate, with patient-oriented lifestyle and behavioral modifications.

Dr. Ethan Atwood is a board-certified psychiatrist. He earned his medical degree from the College of Medicine at the University of Arkansas for Medical Sciences. He completed his psychiatry residency and fellowship at the University of Alabama at Birmingham, and he completed a forensic fellowship at the University of Arkansas for Medical Sciences.

New patients can expect a warm and welcoming atmosphere when beginning their journey with Dr. Atwood. He emphasizes a holistic approach to mental health care, combining medication management with supportive therapies. His empathetic nature and commitment to patient well-being ensures a nurturing and supportive environment.

Dr. Atwood believes in a collaborative approach, working closely with his patients to develop treatment goals and adjust treatment strategies as needed. He is committed to providing ongoing support and guidance, ensuring that patients feel confident and supported throughout their mental health journey.

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Edmund Clark, MD, serves as Chief Psychiatrist at Talkiatry with over 17 years of board-certified experience, including more than 5 years delivering tele-psychiatric care to underserved areas. His career spans 23 years in public service, including leadership roles as Chief of the VA Mental Health Clinics in Jacksonville, FL, and program manager for the University of Florida’s Psychiatry Residency Training Program. A former U.S. Navy psychiatrist, he deployed multiple times, including to Iraq in support of an Army Combat Stress Control clinic, gaining expertise in evidence-based PTSD treatments. Dr. Clark earned his medical degree from the University of Florida and completed his psychiatry residency at the National Naval Medical Center and Walter Reed, serving as chief resident for over 50 military trainees. Before medicine, he served in the U.S. Peace Corps in Kenya.

Dr. Clark values a collaborative approach built on honesty, rapport, and ensuring patients feel heard. He helps patients identify and address multiple factors influencing their mental health, aiming for positive, lasting changes that improve function across life domains. He encourages evidence-based therapies and, when needed, involves other providers to support comprehensive care.

Dr. Clark uses measurement-based tools to assess medication efficacy and guide treatment decisions. He integrates supportive psychotherapy to strengthen coping skills and reduce negative thinking, while incorporating motivational interviewing techniques to promote recovery and self-improvement.