Margaret Ngumi, PMHNP

Dr. Karla Garcia is a board-certified psychiatrist trained in Adult Psychiatry. She graduated from the University of Notre Dame with a Bachelor of Science and a Master of Education. She then went on to complete her medical education and residency training at the University of Chicago. She is board certified in Adult Psychiatry by the American Board of Psychiatry and Neurology.

Dr. Garcia believes in patient-centered care, seeking to care for the whole person.  She values the therapeutic relationship, working to guide patients in their treatment while also encouraging patients to take an active role in their care. Dr. Garcia cares about getting to know you as a person and helping you reconnect with your values. Her clinical approach is holistic, collaborative, and supportive.

Dr. Garcia focuses on evidence-based treatments for psychiatric illness that utilize a combination of medications and psychotherapy. Using a range of skills and interventions, Dr. Garcia believes in a multi-faceted approach to treatment.

Dr. Garcia has experience working in a wide variety of inpatient, emergency, partial hospitalization, intensive outpatient, and outpatient psychiatric settings and in treating a broad spectrum of psychiatric disorders including depression, anxiety, bipolar disorder, trauma, substance use disorders, personality disorders, ADHD, and OCD. She treats patients in English and Spanish.

Dr. Ernesto Gonzalez is a board certified adult psychiatrist. He completed his undergraduate training at Yale University and received his medical degree from the University of Pennsylvania School of Medicine. He completed his residency training at the Cambridge Health Alliance/Harvard Medical School Adult Psychiatry Training Program. Dr. Gonzalez prefers a holistic approach that takes the time to know the whole patient, incorporating biological, psychological, social, and cultural perspectives in crafting a comprehensive, individualized, treatment plan. He practices medication management combined with supportive therapy, typically delivered within 30 minute sessions. Elements of psychodynamic, dialectical behavior and cognitive-behavioral therapy will also be incorporated into sessions based on a patient's individual needs. If additional therapy is needed, Dr. Gonzalez will recommend the addition of an individual therapist to the patient's treatment team. Having dedicated his career to adult outpatient psychiatry, Dr. Gonzalez has worked with patients from a wide range of ages, cultures, ethnicities, and social settings across the New York City area. His primary focus is working with patients with depression, anxiety, ADHD, and PTSD. He also values working with people adjusting to changes in their lives, whether it be grieving the loss of a loved one, changes in employment, relationships, or adjusting to changes that come with age. Prior to joining Talkiatry, Dr. Gonzalez was an Assistant Professor at the NYU Grossman School of Medicine and served as Director of the Adult Outpatient Psychiatric Department, Assertive Community Treatment (ACT) Team, and Collaborative Care Departments at Woodhull Hospital in Brooklyn, New York. He also had a small practice near his home. Dr. Gonzalez has also had a lifelong interest in meeting new people and experiencing different cultures. This interest has taken him as far away as the townships of Cape Town, South Africa and as close as his local diner, and it edifies the work he does with patients.

Background and credentials

Dr. James is a board-certified adult psychiatrist with 32 years of clinical experience. She earned her medical degree from Tufts University, Boston’s affiliated program and completed her residency training at Steward St. Elizabeth Medical Center in Boston, where she initiated the residency program and received the Resident Teaching Award for excellence in teaching. Throughout her career, she has served in various leadership roles, including as Chief of Psychiatry at Pro Medica Healthcare Company.

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Treatment approach

Dr. James specializes in community adult psychiatry and is deeply invested in providing comprehensive care for individuals and families. She has extensive experience working in outpatient, inpatient, consult-liaison, and emergency room settings, allowing her to tailor treatment to diverse patient needs. Her approach prioritizes holistic, patient-centered care, ensuring that each treatment plan aligns with a patient’s specific challenges and goals.

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What you can expect in a first visit

During the first visit, patients can expect a thorough psychiatric evaluation where Dr. James carefully reviews their symptoms, medical history, and treatment objectives. She fosters a compassionate and collaborative environment, ensuring that patients feel supported in their journey toward better mental health. Her extensive experience allows her to provide personalized treatment strategies, which may include medication management and therapeutic interventions tailored to each individual’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. Caleb Cheatham completed his undergraduate studies at Stetson University in DeLand, FL, before earning his medical degree and completing his psychiatry residency at the University of Tennessee Health Science Center in Memphis, TN. He brings a strong foundation in psychopharmacology and a deep commitment to person-centered care.

Dr. Cheatham takes an open, nonjudgmental approach and strives to create a safe space for patients to share vulnerably. He believes in leading with compassion and listening as a core tool for understanding. His treatment philosophy is integrative—combining thoughtful medication management with supportive, individualized therapy—and he encourages patients to consider the role of lifestyle factors like sleep, nutrition, and exercise.

Dr. Cheatham begins with a conversational consultation focused on understanding each patient’s story and needs. Together, they co-create a personalized treatment plan grounded in the patient’s values. He emphasizes clear communication and routinely revisits treatment goals to ensure alignment, progress, and ongoing support.

Dr. Lauren McClairen is a psychiatrist board certified in General Psychiatry and Addiction Medicine. She completed her medical and psychiatric training at Meharry Medical College in Nashville, TN and a fellowship in Addiction Medicine at Baptist Memorial Hospital in collaboration with IAC (Integrated Addiction Care) in Memphis, TN. Dr. McClairen has clinical experience and practice working with other specialties and disciplines in treatment teams and integrated care models both in the inpatient and outpatient setting. She has held an academic appointment at Baptist Memorial Hospital where she enjoyed teaching and supervising medical residents and fellows in training. She most recently served as the Regional Behavioral Health Medical Director for a group of mental health clinics throughout Tennessee, and as the Chief of Psychiatric Services for a residential treatment facility in Mississippi that also had Partial Hospital and Intensive Outpatient Programming (PHP/IOP). She is experienced in treating patients with a variety of mental health diagnoses including but not limited to depression, bipolar disorder, anxiety disorders, ADHD, OCD, PTSD, and those with a history of substance use disorders. Dr. McClairen works collaboratively with her patients to provide treatments tailored to each patient's individualized needs. She prioritizes building trusting relationships and fostering open communication. Patients can expect a compassionate approach often with utilization of supportive therapy, mindfulness, and at times cognitive behavioral and psychodynamic psychotherapy techniques to address their psychosocial stressors and unique needs.

Dr. Seth Sherman is a board-certified adult psychiatrist who has been in practice for over ten years. At the heart of Dr. Sherman's clinical approach is a strong emphasis on establishing trust, rapport, and therapeutic alliance to help persons to feel and live well and to progress toward their goals, both in treatment and in life. Dr. Sherman begins with consultation, a compassionate, collaborative process of discovery that culminates in a working diagnostic impression and, in turn, treatment recommendations. For those with whom he engages in a treatment relationship, Dr. Sherman provides psychoeducation, medication management, and individual psychotherapy, this last modality predominantly drawing from both psychodynamic and behavioral psychological models to tailor treatment to each patient. On some occasions, Dr. Sherman may believe that additional therapy is needed and ask that you bring a therapist into your care team to provide the best outcome. Dr. Sherman received his medical degree from Stanford University and went on to complete his residency in psychiatry at Harvard University. After completing training, he cultivated a private practice of psychiatry in San Francisco, California, treating persons with a variety of psychiatric illnesses, while also providing consultation and clinical supervision to psychotherapists in day-treatment and office-based practices. Next, Dr. Sherman served as a psychiatry professor at the Florida Atlantic University Charles E. Schmidt College of Medicine in Florida, where, as Associate Director of the Psychiatry Residency Training Program, he provided psychiatric inpatient treatment while bringing leadership, scholarship, teaching, supervision, and mentoring to psychiatry residents and medical students. Most recently, Dr. Sherman worked as a senior medical officer/consultant psychiatrist in New Zealand's public health system, serving local communities with expert diagnosis and treatment for a wide range of mental health conditions. He also continued to supervise U.S.-based psychiatrists, along with New Zealand psychotherapists, in advanced and complex clinical psychopharmacology and psychotherapy.