Skip to main content

Marnie Stefan, MD

Staff Psychiatrist
Languages
English
Spanish
Conditions Treated
Medication Management

Education and training

  • University Of Puerto Rico School Of Medicine, MD
  • University of Florida College of Medicine, Residency

Get to know

Marnie Stefan, MD

Background and credentials

Dr. Stefan is a psychiatrist with extensive experience in outpatient care, inpatient care, and assertive community treatment. She has served as a medical director for large institutions, overseeing the treatment of individuals with complex mental illnesses. Born and raised in Puerto Rico, she is fluent in both English and Spanish. She earned her medical degree from the University of Puerto Rico School of Medicine and completed her psychiatry residency at the University of Florida, where she received recognition for her skills as a psychotherapist.

Treatment approach

Dr. Stefan is deeply committed to patient-centered care, adapting her role to the individual needs of each patient. She believes in treating the whole person, rather than just a diagnosis, recognizing that each patient has unique psychosocial circumstances. She has a strong foundation in psychotherapeutic interventions and is dedicated to providing engaging, compassionate, and meaningful therapy in every patient interaction. With over 10 years of experience as a psychiatrist, she has worked extensively in telemedicine since 2013, ensuring that remote care is as effective and personal as in-person visits.

What you can expect in a first visit

Patients meeting Dr. Stefan for the first time can expect a comprehensive and holistic evaluation that considers their symptoms, personal history, and life circumstances. She takes the time to build strong therapeutic relationships, fostering a caring and engaging environment where patients feel understood and supported. Whether through telemedicine or in-person care, she prioritizes personalized treatment plans that integrate medication management and psychotherapy, ensuring the highest quality of care tailored to each patient’s needs.

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.

Get matched with a clinician like this one

Ready to book your first appointment? Take our 10-minute assessment. We’ll match you with a clinician who meets your needs, has availability, and takes your insurance.

Get started
More Clinicians

Joy Osaji, MD

Staff Psychiatrist

Dr. Osaji is an Adult Psychiatrist who completed her psychiatry training at Texas Tech University Health Sciences Center, Lubbock, Texas. She served her program as a chief resident, which helped to build her leadership and interpersonal skills. She also dedicated herself to leading her resident team and fostering a supportive learning environment. She received the award of excellence in psychiatry knowledge during her residency training. She also has a Master's in Public Health from Texas Tech University Health Sciences Center and is a Phi Kappa Phi Honor Society member.

Dr. Osaji is an adult outpatient psychiatrist who provides care via telehealth. She strives to create a supportive, collaborative space where patients can explore what's bringing them in and work together to determine the best path forward. Whether someone is new to mental health care or returning after some time away, Dr. Osaji recognizes that it's normal to feel a mix of emotions at the start. She takes a thoughtful, personalized approach to treatment that may include medication, therapy recommendations, or simply creating space to talk. While telehealth offers flexibility and convenience, Dr. Osaji is committed to building a meaningful connection with each patient. She does not provide emergency services between sessions but ensures patients can access the appropriate resources when needed. As someone early in her career, Dr. Osaji brings fresh training and a strong commitment to transparency, lifelong learning, and evidence-informed care. She values open communication and believes deeply in each person's capacity for meaningful change.

Dr. Osaji creates a supportive, collaborative space to help patients explore their mental health concerns and goals. She takes a personalized approach that may include medication, therapy referrals, or check-ins, always valuing patient input. Follow-up visits are 20 to 30 minutes, focusing on monitoring progress and adjusting care as needed. She offers convenient access through telehealth while building meaningful, transparent relationships rooted in respect and growth. Dr. Osaji also values collaborative care and often coordinates with therapists or refers patients to therapy when additional support can enhance outcomes.

Mark Sundahl, MD

Staff Psychiatrist

Dr. Mark Sundahl is a board-certified adult psychiatrist. He was born and raised in the suburbs of Kansas City, Kansas. He has always been fascinated by the natural world and received a bachelor’s degree in biology at Kansas State University where he was active in a research lab investigating protein function in the human body. He completed medical school training and residency at the University of Kansas School of Medicine in Kansas City, Kansas along with Wichita, Kansas. Dr. Sundahl has experience working with a broad range of mental health symptoms and a diverse patient population

Dr. Mark Sundahl is a board-certified adult psychiatrist. He was born and raised in the suburbs of Kansas City, Kansas. He has always been fascinated by the natural world and received a bachelor’s degree in biology at Kansas State University where he was active in a research lab investigating protein function in the human body. He completed medical school training and residency at the University of Kansas School of Medicine in Kansas City, Kansas along with Wichita, Kansas. Dr. Sundahl has experience working with a broad range of mental health symptoms and a diverse patient population

Dr. Sundahl understands the importance of collaboration and the therapeutic alliance when working with patients. He will clearly explain his findings and discuss treatment options he feels are reasonable. Dr. Sundahl thinks it is important for patients to have all the necessary information to make informed decisions when it comes to their psychiatric treatment.

Reaghan Hicks, MD

Staff Psychiatrist

Dr. Reaghan Hicks is a double board-certified psychiatrist in General and Addiction Psychiatry. She completed her undergraduate training at The College of Charleston followed by medical school at The University of South Carolina School of Medicine. Dr. Hicks completed Residency in General Psychiatry at The University of Florida College of Medicine in Jacksonville followed by Fellowship in Addiction Psychiatry at The Medical University of South Carolina. Dr. Hicks is an experienced clinician that specializes in treating individuals with a variety of diagnoses including adjustment disorders, depression, anxiety, PTSD, bipolar disorder, ADHD, and substance use disorders.‍She has an approachable style and values building rapport with her patients. She believes it is a privilege to be a part of someone's journey towards recovery and wellness. Dr. Hicks aims to meet each patient where they are while maintaining a nonjudgemental, patient-centered, and evidenced-based treatment approach. Dr. Hicks provides supportive psychotherapy, cognitive behavioral skills, and utilizes motivational interviewing to meet the needs of her patients. She believes effective utilization of therapy skills in conjunction with medication management can help patients meet their individualized treatment goals.

Marianne Marsh, MD

Staff Psychiatrist

Dr. Marianne Marsh has more than 30 years of experience. She earned her medical degree and completed her psychiatry residency at the University of Vermont and holds a bachelor’s degree in Nutrition Science from the University of California, Davis. Dr. Marsh has practiced extensively in outpatient settings, serving patients of all ages with a wide range of mental health concerns. She has worked in clinical roles, trained psychiatry residents and staff, and developed innovative programs to meet community needs. Prior to joining Talkiatry, she served as Chief Medical Officer at Monadnock Family Services in Keene, NH. She also brings expertise in trauma therapy, Dialectical Behavioral Therapy, and women’s psychology.

Dr. Marsh strives to create an open, warm, and accepting environment where patients feel safe to share their experiences. She values and honors diversity, welcoming all belief systems and cultural backgrounds. Her approach is holistic, integrating the mind-body connection and drawing on both ancient traditions and modern medicine. She emphasizes compassion, trust, and respect to build a supportive relationship that empowers patients to heal and grow.

Dr. Marsh begins treatment by thoroughly exploring a patient’s history and how it connects to their current concerns. She works collaboratively to understand each individual’s values and incorporates them into care. Ongoing sessions continue to explore how symptoms relate to life experiences, and together, Dr. Marsh and her patients create treatment goals that align with their beliefs and vision for the future.

Farrah Lamoreux, PMHNP

Staff Nurse Practitioner

Farrah has worked almost exclusively in community mental health centers in Iowa and in Arizona for the last 15 years. She has been providing telepsychiatry services since 2013 across several states, serving hospitals, community mental health centers, local jails, and residential treatment facilities. Farrah was lead prescriber for Living Out Loud, a mental health program exclusively for LGBTQ+ persons. She has worked with patients with comorbid mental health & HIV+ status, and a long history of working with persons with severe mental illness.

Farrah has mentored countless new Psychiatric Nurse Graduates in their first year of outpatient practice and precepted students working to achieve their Psychiatric Nurse Practitioner Certification. She was also part of the pilot program for the Integrated Behavioral Health Home, which integrated primary care into treatment for SMI patients.

Farrah Lamoreux offers a warm patient centered approach to psychiatry. She is well known for being easy to talk to, and down to earth. Farrah believes that the patient is the most important part of the treatment team, and engaging patients in the decision-making process of their treatment. Patients say that she listens, they feel heard, and that she tailors care to what best fits your needs. She enjoys working with therapists whenever possible to ensure the best outcomes. Farrah specializes in the treatment of ADHD, but also treats Depression, PTSD, Anxiety, Panic, Agoraphobia, OCD, Autism and Bipolar Disorder.

Christopher Debernard, MD

Staff Psychiatrist

Dr. Christopher DeBernard is a board-certified psychiatrist with extensive clinical leadership experience. He earned his MD and completed a combined residency in Internal Medicine and Psychiatry at Tulane University School of Medicine. Previously board certified in Internal Medicine, he is especially comfortable caring for patients with medical comorbidities. Dr. DeBernard has worked in both inpatient and outpatient settings and held leadership roles as Chief Medical Officer at Arisa Health and Lotic.ai. He also brings a systems-thinking perspective to clinical care from earlier careers in engineering and consulting. He holds active medical licenses in Louisiana and Arkansas.

Dr. DeBernard strives to create a warm, collaborative environment where patients feel respected, understood, and supported. His approach combines evidence-based medicine with an appreciation for each patient’s unique story, values, and motivations. Patients can expect open, direct communication, shared decision-making, and treatment plans that align with their personal goals. Trust, empathy, and authenticity form the foundation of his therapeutic relationships.

Dr. DeBernard begins by listening closely to each patient’s history, concerns, and hopes for treatment. Together, he works with patients to establish clear goals and develop individualized care plans that may include therapy, medication management, and lifestyle approaches. His focus is on both symptom relief and building long-term resilience, helping patients develop strategies that sustain well-being. Over time, he collaborates with patients to adapt treatment as their needs evolve, ensuring care remains effective and personalized.

Ready to get matched?

Start our short assessment
Specialties
Medication Management
States
Florida
New York
Languages
English
Spanish
Takes insurance
Virtual visits
10 years experience