Karelis Sierra-Cintron, MD

Dr. Emily Sykes is a board-certified adult psychiatrist. She received her Bachelor of Arts degree with Magna Cum Laude distinction from Carleton College, where she majored in biology. Dr. Sykes completed her Doctor of Medicine degree from the University of Toledo. She completed her psychiatry residency at the University of Cincinnati and was the outpatient chief resident physician. Dr. Sykes' specialty interests include mood disorders, anxiety disorders, post-traumatic stress disorder (PTSD), obsessive-compulsive and related disorders, Cognitive-Behavioral Therapy (CBT) and holistic wellness. She is a certified Cognitive Processing Therapy (CPT) provider for PTSD. Dr. Sykes provides compassionate, evidence-based, individualized, holistic care for patients suffering from a variety of mental health diagnoses and concerns. She incorporates supportive therapy, cognitive-behavioral therapy and solutions-focused therapy into her sessions.

Dr. Natalie Cummings is a board-certified adult psychiatrist, and board-eligible geriatric psychiatrist. She obtained her medical degree from the University of North Carolina at Chapel Hill, and completed her residency training in psychiatry at the University of Miami Miller School of Medicine and Jackson Memorial Hospital. She then went on to complete her geriatric psychiatry fellowship at Icahn School of Medicine at Mount Sinai Beth Israel. During her fellowship, Dr. Cummings participated in Mount Sinai's Visiting Doctors Program, providing patient-centered and compassionate care to homebound elder adults in New York City. She also received training at Coler Rehabilitation and Nursing Care Center on Roosevelt Island during her fellowship, and presented at the American Association for Geriatric Psychiatry annual meeting. During her training, Dr. Cummings gained extensive experience providing psychiatric care to various patient populations in multiple patient care settings, including in the outpatient clinic, inpatient unit, and emergency department. Following her training, Dr. Cummings worked at New York Presbyterian's Gracie Square Hospital, serving first in the position of float psychiatrist, providing care to patients on every inpatient psychiatric unit (including the young adult/college student program, Orthodox Jewish program, psychotic disorders program, crisis-stabilization program, dual focus program, and Asian Psychiatry program), before transitioning to an established psychiatric attending for the older adult program. During her time at Gracie Square Hospital, Dr. Cummings received the Physician of the Year Award, and served as a Clinical Assistant Professor of Psychiatry at Weill Cornell Medicine. She worked closely alongside staff psychologist, social workers and nurses to provide multidisciplinary, collaborative care to patients suffering from a variety of mental health conditions. Dr. Cummings primarily focuses on medication management and supportive psychotherapy, but has extensive training in utilizing various therapy modalities, including cognitive behavioral therapy, interpersonal therapy, reminiscence therapy, and psychodynamic psychotherapy. When appropriate, Dr. Cummings will refer for more extensive psychotherapy and/or collaborate with your established psychotherapist for comprehensive care. Dr. Cummings strongly believes that addressing psychosocial and interpersonal factors (including relationship health, economic stressors, social isolation and loneliness) is as essential as pharmacologic management in treating mental health conditions. She has particular experience and interest in treating older adults and those suffering from memory disorders, but provides treatment for a variety of psychiatric conditions including depression, anxiety, bipolar disorder, obsessive-compulsive disorders, trauma-related disorders and substance use disorders. Dr. Cummings is a member of the American Psychiatric Association and American Association for Geriatric Psychiatry.

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. Jennifer Hailey is a board-certified psychiatrist in Psychiatry. She completed her undergraduate training at Michigan State University followed by medical school at Nova Southeastern University College of Osteopathic Medicine. She has completed a residency in psychiatry at Michigan State University. Dr. Hailey has worked in many different settings including private hospitals, jails, military treatment facilities and private practice. She enjoys educating her fellow providers who specialize in psychiatry as well as other areas of medicine. She has a genuine interest in treating a vast array of psychiatric disorders including depression, anxiety, post-traumatic stress disorders, obsessive compulsive and personality disorders. She also has experience in treating patients with medical comorbidities and has training in issues related to women's health.

Dr. Jessica Healey is a board-certified adult psychiatrist. She obtained her medical degree from Cooper Medical School of Rowan University and completed her residency training in psychiatry at the University of Miami Miller School of Medicine and Jackson Memorial Hospital. During her training, Dr. Healey gained extensive experience providing psychiatric care to various patient populations in multiple patient care settings, including in the outpatient clinic, inpatient unit, and emergency department. Following her training, Dr. Healey worked as an outpatient psychiatrist for the Veterans Health Administration. During her tenure with the VA, she worked closely with staff psychologists, social workers and nurses to provide multidisciplinary, collaborative care to the veteran population suffering from a variety of mental health conditions.

Dr. Healey has experience and interest in treating adults suffering from trauma-related disorders and anxiety disorders but provides treatment for a variety of psychiatric conditions including depression, bipolar disorder, and obsessive-compulsive disorder.

Dr. Healey focuses on medication management and supportive psychotherapy, but has training in utilizing various therapy modalities, including cognitive behavioral therapy, interpersonal therapy, and psychodynamic psychotherapy. When appropriate, Dr. Healey will refer for more extensive psychotherapy and/or collaborate with your established psychotherapist for comprehensive care.

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Dr. Desir is a Board-Certified Psychiatrist who completed her undergraduate training at The University of Scranton followed by medical school at the New York Institute of Technology College of Osteopathic Medicine. She completed psychiatry residency at Nassau University Medical Center where she served as the Administrative Chief Resident in her final year. Dr. Desir has been in practice for 4 years and has provided patients with compassionate psychiatric care. She has worked in community mental health settings throughout her career, in which she served a wide variety of patient populations. Dr. Desir is experienced in treating various psychiatric illnesses including mood disorders, anxiety disorders, OCD, PTSD, and ADHD. At the heart of Dr. Desir's clinical approach is a strong emphasis on establishing trust and building a therapeutic relationship. She also provides psychoeducation to help patients make informed decisions regarding their care. She works collaboratively with patients to develop individualized treatment plans to help them achieve their goals. Dr. Desir's practice focuses on medication management. Typically, she offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. Occasionally, Dr. Desir may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. Talkiatry takes medication management seriously. All state-controlled substance databases are reviewed and taken into consideration during your initial evaluation.