Michael Watkins, MD

Background and credentials

Dr. Kristina Schnitzer is a board-certified psychiatrist. She earned her medical degree from the New York University School of Medicine and completed her residency in Adult Psychiatry at the Massachusetts General Hospital/McLean Adult Psychiatry Residency Program. She further specialized by completing a one-year clinical and research fellowship in Public and Community Psychiatry through Massachusetts General Hospital and the Massachusetts Department of Mental Health. In addition to her medical training, she holds a Master of Public Health (MPH) from the Harvard T.H. Chan School of Public Health. She has over three years of experience practicing psychiatry across inpatient, emergency, and outpatient settings.

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Treatment approach

Dr. Schnitzer focuses on medication management as the foundation of her treatment approach, typically combining it with supportive or emotionally focused therapy during 30-minute follow-up visits. She takes a collaborative and individualized approach to patient care and, when needed, may recommend additional therapy by integrating a therapist into the care team to ensure the best possible outcomes. She has experience treating a broad range of psychiatric disorders in various clinical settings.

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What you can expect in a first visit

Patients can expect a thorough and structured evaluation in their first visit, where Dr. Schnitzer carefully assesses their symptoms, medical history, and treatment goals. She emphasizes open communication and collaboration, ensuring that patients are fully involved in shaping their treatment plans. Follow-up visits typically last 30 minutes, during which she monitors progress, adjusts treatment as needed, and may recommend additional therapeutic support for comprehensive care.

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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. Pereira is a board-certified adult psychiatrist who is dedicated to providing compassionate care for a wide range of mental health concerns. He received his Bachelor of Arts from Harvard University and his medical degree from The Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, where he graduated with the Department of Psychiatry's award of distinction. He went on to complete his psychiatric residency training at Northwell Health's Zucker Hillside Hospital, with a specialization in the assessment and treatment of obsessive compulsive disorder and related conditions. Dr. Pereira's clinical approach emphasizes building trust with his patients and working collaboratively to develop an individualized treatment plan. He uses medication management along with cognitive behavioral therapy, exposure and response prevention, psychodynamic psychotherapy, interpersonal psychotherapy, and supportive therapy as needed. His practice treats a wide range of conditions, including depression, anxiety, OCD, family and relationship struggles, and other mental health issues. He has been trained in a wide range of settings including inpatient, outpatient, emergency departments, and behavioral health crisis centers. He also has experience teaching and supervising medical students and psychiatry residents.

Dr. Shafi completed his undergraduate studies in biology at the University of Nevada Las Vegas. He then earned his medical degree from Touro University Nevada College of Osteopathic Medicine. He went on to complete his psychiatry residency at the Kirk Kerkorian School of Medicine at UNLV, where he was awarded “Master of the PRITE” for achieving the highest score on the Psychiatry Resident In-Training Examination.

Dr. Shafi specializes in the treatment of various psychiatric conditions including anxiety, depression, bipolar disorder, ADHD, and PTSD. He has practiced in multiple settings including inpatient psychiatric facilities, outpatient mental health clinics, and the VA system.  

Dr. Shafi primarily focuses on medication management in conjunction with supportive psychotherapy. Using a collaborative and patient-centered approach, he provides personalized care by tailoring treatment to his patients’ unique needs. Dr. Shafi’s curiosity and compassionate nature allow him to connect with patients from all walks of life. He is committed to creating a supportive environment where patients feel comfortable expressing their mental health concerns.

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Dr. Alfers is a board-certified psychiatrist specializing in adult psychiatry. He has been practicing for over 11 years. He completed his undergraduate education at Virginia Tech, graduating Cum Laude with degrees in Biology and Chemistry. Following graduation, he attended a research internship at the National Institutes of Health where he received a Post-baccalaureate Intramural Research Training Award. Dr. Alfers completed his medical degree from the Western University of Health Sciences in Pomona, CA. He completed his General Psychiatry Residency at Georgetown University, where he served as Chief Resident. After residency, he entered private practice in McLean, VA. Dr. Alfers takes a comprehensive approach to patient care. He integrates biological, psychological, and environmental factors into treatment planning. He focuses on developing a meaningful therapeutic relationship and providing medication interventions for specific treatment goals. Dr. Alfers provides interpersonal psychotherapy in conjunction with medication management services. Dr. Alfers has a special interest in the treatment of multiple mental health conditions, including depression, anxiety, bipolar disorder, PTSD, ADHD, and OCD. Dr. Alfers treats adults ages 18 to 65 years old. For established patients of Dr. Alfers, please call 917-634-5311 to schedule an appointment and let the care coordinator know you are an established patient.

Margaret Ngumi, MSN, APRN, FNP-C, PMHNP-BC, is a dual board-certified Psychiatric Mental Health and Family Nurse Practitioner with over 20 years of experience in healthcare. She began her career as a Family Nurse Practitioner and later pursued a post-master’s certification in psychiatry to address the growing need for accessible mental health services. Margaret has extensive experience in both inpatient and outpatient settings, treating conditions such as depression, anxiety, PTSD, mood disorders, and substance use disorders.

She takes a collaborative, patient-centered approach to care, creating a safe and supportive environment where individuals feel heard and empowered. With a strong emphasis on holistic care, Margaret considers all aspects of a patient’s well-being—including lifestyle, relationships, and overall health. Whether through medication management, therapy, or lifestyle modifications, she is committed to helping patients achieve meaningful and lasting improvements in their mental health.

Margaret begins with a comprehensive psychiatric evaluation to understand each patient’s history, concerns, and goals. She then works closely with them to develop a personalized care plan that may include medication, therapy, and evidence-based lifestyle interventions. She prioritizes open communication, patient education, and ongoing collaboration to ensure treatment remains effective and evolves with each patient’s needs. Through her compassionate and evidence-based approach, Margaret is dedicated to helping individuals find balance and improve their overall quality of life.

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Dr. Steven Wilkening is a board-certified adult psychiatrist.He completed his Bachelor of Arts degree at Cornell University followed by a neuroscience researchfocused Masters degree at the University of Mississippi. He then attended medical school at theUniversity of Mississippi School of Medicine, graduating with his MD degree as a Medical StudentResearch Scholar and member of the Alpha Omega Alpha Honor Medical Society. He completed adultpsychiatry residency training at the University of Cincinnati and has since been working primarily intelepsychiatry.He has experience treating a wide variety of psychiatric conditions and also recognizes that lifestylefactors such as sleep, physical activity and stress-reduction are foundations of good mental health.Alongside medication management, he provides brief supportive psychotherapy, psychoeducation, aswell as elements of cognitive behavioral and solution-focused therapies to assist patients in meetingtheir goals. He often encourages patients to see a therapist in addition to a psychiatrist.