Margaret Ngumi, PMHNP

More Clinicians

Dr. Delima-Tokarz is double Board Certified in Psychiatry and Lifestyle medicine. She completed her psychiatry residency training at the University of Maryland/Sheppard Pratt, where she served as the chief resident. She has practiced in various settings over her career, including working for the Department of Defense, private practice, and community mental health. Dr. Delima-Tokarz is fluent in Portuguese, English, and Spanish. Dr. Delima-Tokarz has more than five years of experience treating patients with anxiety, depression, PTSD, Bipolar, OCD, ADHD, and other mental health issues. She employs pharmacotherapy along with supportive therapy and integrative approaches. Dr. Delima-Tokarz is currently working on completing her Ph.D. in Integrative Medicine and is passionate about a holistic and integrative approach to mental health. Her philosophy includes a healing-oriented approach that considers the whole person, including all lifestyle aspects. Dr. Delima-Tokarz aims to provide collaborative and comprehensive care, which may include medication management, lifestyle interventions, stress reduction techniques, and other integrative approaches. She believes building a strong therapeutic relationship where the patient feels empowered is the key to healing.‍

Celeste Boyd, PMHNP

Staff Nurse Practitioner

Ms. Celeste Boyd is a dual board certified Psychiatric Mental Health and Family Nurse Practitioner. She is the CEO and Founder of Metamorphosis Psyche, a psychiatric mental health resource platform. She has practiced in family medicine since 2011 and psychiatric mental health medicine since 2013. She has clinical experience and expertise in substance use disorders, addiction rehabilitation, sleep medicine, general psychiatry, and serious mental illness (SMI) in both private and public sectors. In Academia, she has extended her knowledge and experience as Adjunct Clinical Faculty at School of Nursing Graduate Programs.

Since 2017, Ms. Boyd has been practicing general psychiatry in the outpatient private sector. Ms. Boyd provides medication management and psychotherapy for acute, chronic, and comorbid psychiatric conditions that include Anxiety Disorders, Depression, Mood Disorders, ADHD, OCD, and PTSD. Her clinical treatment modalities include supportive therapy, solution-focused therapy, motivational enhancement, mindfulness, and cognitive behavioral therapy.

As a clinician, she promotes mental health awareness to reduce stigmatization and empower those suffering and struggling with mental illness. Ms. Boyd clinical practices are oriented towards the Mental Health Recovery Model, which permits individuals to go through an active process of change, being in control, strengthening, and empowering themselves to improve their mental health and well-being.

Sameerah Akhtar, MD

Staff Psychiatrist

Dr. Akhtar is a board-certified psychiatrist specializing in compassionate and comprehensive mental health care. She focuses on medication management for a wide range of psychiatric conditions, providing supportive therapy to help individuals navigate life's challenges and enhance their overall well-being, while emphasizing lifestyle changes and the development of coping skills. Dr. Akhtar completed her medical degree at the American University of Antigua, gaining a profound understanding of the biological, psychological, and social aspects of mental health. Following her residency at Bergen, Newbridge Medical Center, where she was appointed Chief Resident in her fourth year, she worked for several years in both inpatient and outpatient hospital settings. Committed to holistic wellness, Dr. Akhtar believes in empowering individuals to make positive changes in their lives and offers guidance on nutrition, exercise, sleep hygiene, and stress management techniques. She is dedicated to fostering a therapeutic alliance built on trust, empathy, and collaboration. Her approach is rooted in evidence-based practices and tailored to meet the unique needs of each individual under her care.

Osman Athar, MD

Staff Psychiatrist

Dr. Osman Athar is board certified in General Psychiatry and board eligible in Consult-Liaison Psychiatry. He graduated with a Bachelor of Arts in English from Rice University and McGovern Medical School for his medical doctorate, and went on to complete a psychiatry residency at the University of Texas-Houston, where he served as a chief resident. Afterward, he completed a fellowship in Consult-Liaison Psychiatry at Louisiana State University - Ochsner Medical Center in New Orleans. Dr. Athar has experience in treating a wide variety of conditions, including Major Depression, OCD, Bipolar Disorder, ADHD, Eating Disorders, Anxiety Disorders, PTSD, Substance Use Disorders, Delirium, Dementia, and Mental Disorders due to Another Medical Condition. Dr. Athar primarily focuses on medication management in his practice but will typically also use supportive therapy and cognitive behavioral therapy skills with his patients in order to maximize wellness and recovery. Dr. Athar held an academic appointment at the University of Mississippi Medical Center where he was an assistant professor of psychiatry. He served as the clerkship director for the Medical Neuroscience and Behavior Course during his appointment, which required a six-week course for third-year medical students, which included four weeks of psychiatry education. During his appointment, Dr. Athar was also very active in resident education, focusing on topics related to consult-liaison psychiatry. Dr. Athar has experience in treating a wide variety of conditions, including Major Depression, OCD, Bipolar Disorder, ADHD, Eating Disorders, Anxiety Disorders, PTSD, Substance Use Disorders, Delirium, Dementia, and Mental Disorders due to Another Medical Condition. Dr. Athar primarily focuses on medication management in his practice.

Tyler Josephs, DO

Staff Psychiatrist

Background and credentials

Dr. Tyler Josephs is a staff psychiatrist at Talkiatry. He earned his medical degree from Kansas City University in 2017 and completed his psychiatric residency at the University of Kansas Medical Center in 2021. During his residency, he served as Chief Resident at both the University of Kansas Medical Center and the Kansas City VA Medical Center. Most recently, Dr. Josephs worked at the Kansas City VA Medical Center, where he was the psychiatric director of the outpatient mental health clinic and served as Psychiatry Executive for behavioral health services.

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Treatment approach

Dr. Josephs believes in a holistic approach to mental health treatment, integrating medication management, supportive psychotherapy, and collaboration with therapists and support staff. He tailors treatment to each patient's unique needs, ensuring a comprehensive and individualized approach to care. His expertise includes treating a variety of psychiatric diagnoses, such as depression, anxiety disorders (including OCD), ADHD, and PTSD.

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What you can expect in a first visit

In a first visit, patients can expect a thorough evaluation, where Dr. Josephs takes the time to understand their medical history, symptoms, and treatment goals. He emphasizes open communication and collaborative decision-making, ensuring that patients feel heard and supported. Based on this initial assessment, he will develop a personalized treatment plan, which may include medication management and referrals to therapy or other supportive services as needed.

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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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Emmalee Boyle, MD

Staff Psychiatrist

Dr. Emmalee Boyle is a board-certified adult psychiatrist who specializes in providing patient-centered care. She offers a mix of medication management in conjunction with supportive therapy in 30-minute follow-up visits. Dr. Boyle's areas of interest include treating mood disorders, anxiety disorders, and co-occurring substance use disorders. In addition, she enjoys helping the patient explore a holistic approach to their mental health treatment. Dr. Boyle received her medical degree from the Medical College of Wisconsin. She completed her general psychiatry residency training at Boston University Medical Center, where she was selected as co-chief resident. She also completed an additional post-graduate fellowship at the Massachusetts Institute of Psychoanalysis. During training, Dr. Boyle worked with an ethnically, culturally, and linguistically diverse patient population with various psychiatric illnesses and has experience navigating the many intersecting systems of mental health care. In addition, she worked with experts in the fields of psychosis and substance abuse. She also co-authored a book chapter on the immune system and psychiatric illness. Dr. Boyle also has particular clinical interests in immigrant and refugee health.

Amanda Carrera Alvarez, MD

Staff Psychiatrist

Dr. Amanda Carrera-Alvarez is double board-certified in Psychiatry and Consultation-Liaison Psychiatry. She received her medical degree from Universidad Central del Caribe in Puerto Rico, completed a 1-year Internship in Internal Medicine at the Ramon Ruiz Arnau University Hospital in PR, and went on to complete Residency in Psychiatry at Lincoln Medical and Mental Health Center in the Bronx. Dr. Carrera-Alvarez then completed a 1-year Fellowship in Consultation Liaison at St. Luke's and Roosevelt Medical Centers in New York City, further acquiring proficiency in caring for patients with complex medical and psychiatric comorbidities. After completing training, Dr. Carrera worked briefly as a Psychiatric Consultant for patients admitted to medical units and as an Electroconvulsive Therapy Psychiatrist to patients in the Inpatient Psychiatric Units, in Woodhull Hospital in Brooklyn. During this time and through training, she worked part-time/moonlighted in the Margaret Cochran Corbin VA Campus located on NYC and eventually moved to work there permanently in the roles of Outpatient Psychiatrist, Consultant Psychiatrist to outpatient medical specialties, and ECT Psychiatrist. More recently she held the position of Acting Program Manager and Outpatient Psychiatrist to the VA Mayagüez Outpatient Clinic in Puerto Rico. Dr. Carrera-Alvarez focuses on medication management while also implementing elements of supportive, psychodynamic, and cognitive behavioral therapy within each session to fully address individual needs. At times, Dr. Carrera-Alvarez may recommend a therapist for additional and/or more specialized therapy. Dr. Carrera-Alvarez is experienced in treating a wide range of psychiatric conditions including depression, bipolar disorder, anxiety, PTSD, OCD, among others.

Nidhi Sharoha, DO

Staff Psychiatrist

Dr. Nidhi Sharoha is a double board certified psychiatrist in Psychiatry and Consultation Liaison Psychiatry. She completed her undergraduate training at Stony Brook University followed by medical school at New York Institute of Technology College of Osteopathic Medicine. She has completed both a Residency in Psychiatry and Fellowship in Consultation Liaison Psychiatry at Nassau University Medical Center. Dr. Sharoha has held academic appointments at Stony Brook University Hospital, practicing as a consultant psychiatrist and Associate Director of Consultation Liaison Psychiatry Fellowship. She has been deeply involved in teaching throughout her years. She has a genuine interest in treating a vast array of psychiatric disorders including depression, anxiety, bipolar disorders, post-traumatic stress disorders, and obsessive compulsive and related disorders. She also has experience in treating patients with medical comorbidities and has training in issues related to women's health. Patients looking for a psychiatric provider will find that Dr. Sharoha has a gentle approach to diagnosis and management of her patients. She believes in the principle that body and mind are interconnected, which allows her to provide comprehensive care to all of her patients.

David Eiler, MD

Staff Psychiatrist

***Provider does not prescribe controlled substances*** Dr. David Eiler is a staff psychiatrist at Talkiatry. He is board certified in adult psychiatry. Before joining Talkiatry, Dr. Eiler was a staff psychiatrist at Dartmouth-Hitchcock Medical Center (DHMC), where he had an academic appointment and served as clinical director of transcranial magnetic stimulation (TMS) and intranasal esketamine services. In his practice, Dr. Eiler has focused on medication management and interventional techniques, including TMS, for the treatment of depression and other disorders. Dr. Eiler received his MD from the University of Wisconsin School of Medicine and Public Health and completed his residency at DHMC.

Tetyana Tarnavsky, MD

Staff Psychiatrist

Dr. Tetyana Tarnavsky is a board-certified psychiatrist trained in Adult Psychiatry. She attended Dnipropetrovsk State Medical Academy in Ukraine where she received her M.D., M.S. and Ph.D. degrees in Psychiatry. Dr. Tarnavsky completed her residency at Harvard South Shore Psychiatry Residency Training Program in MA, where she was elected chief resident. Dr. Tarnavsky has an extensive research experience in Ukraine and the USA. She had studied computer addiction for her dissertation; had multiple abstracts and presentations; published several articles in peer-reviewed psychiatric journals as well as a book entitled Computer Addiction: Formation, Diagnosis, Correction and Prophylaxis. She has helped organize international conferences with the goal of improving access to and quality of healthcare in Dnipropetrovsk, Ukraine, and providing a national model for health care reform. Dr. Tarnavsky has worked with a variety of patients with diverse backgrounds in a Community Health Center and in the Partial Hospitalization Program as well as supervised medical students, psychiatry residents, and nurse practitioners. She has been a lecturer on psychiatry at Harvard Medical School and was involved in the training of psychiatry residents in the Harvard South Shore Psychiatry Training Program. Her primary focus has been on treating adults with depression, anxiety, post traumatic stress disorder, adjustment disorder, ADHD and other disorders. Dr. Tarnavsky strives to provide quality and compassionate treatment to individuals and their families.‍

Waded Baquerizo-Mahuad, LPC

Staff Therapist

Waded Baquerizo-Mahuad is an LPC (Licensed Professional Counselor) in the state of Pennsylvania. She received her Master's (M.A.) in Mental Health Counseling from Kutztown University in 2016. She is also a Clinical Psychologist in her home country of Ecuador. She has provided mental and behavioral services to children and their families as a therapeutic staff support and mobile therapist, providing in-home services and services in the community. She has worked in Community Mental Health and Private Practice where she has gained experience treating various Mental health diagnoses that include PTSD, Anxiety, Depression, OCD, Grief, Adjustment Disorders, etc. As an experienced bilingual counselor, she utilizes an eclectic approach in her practice, taking into consideration the stage and uniqueness of her client's psychological, emotional, and social needs. Some of her approaches in therapy are the person-centered approach, cognitive behavioral therapy, psychodynamic approach, motivational interviewing, and solution-focused approach. She integrates Sensory Motor techniques as well as Mindfulness and Grounding techniques. In her practice, she also applies a Strength-Based Modality and Trauma-informed Focus. She also implements Eye Movement Desensitization and Reprocessing (EMDR) interventions.

Jacqueline Lewandowski, MD

Staff Psychiatrist

Dr. Jacqueline Lewandowski is a board-certified physician specializing in adult psychiatry. She obtained her undergraduate degree from New York University where she studied psychology and child/adolescent mental health. Dr. Lewandowski received her medical degree from St. George's University in Grenada, before moving back to New York to complete her residency at Morningside and West Mount Sinai Hospitals. Since completion of training, Dr. Lewandowski has practiced and held teaching positions in both the Comprehensive Psychiatric Emergency Department of Harlem Hospital and the inpatient units and psychiatric emergency rooms of Morningside and West Hospitals. Dr. Lewandowski has a wide range of experience treating a diverse spectrum of psychiatric diagnoses and populations. She strongly believes in tailoring treatments through a holistic and patient-centered lens based on individual and multi-faceted histories. During 30-minute monthly sessions, Dr. Lewandowski focuses on collaborating with patients using evidence-based treatments with an emphasis on medication management in conjunction with supportive therapy. Additionally, she may recommend bringing a therapist into your care team to help facilitate a more comprehensive treatment plan. Dr. Lewandowski looks forward to working with you to help achieve and optimize your wellness and improve your quality of life.

Margaret Ngumi, PMHNP

Education and training

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