Absar Tahir, MD

Dr. Tony Tu is a board certified adult psychiatrist who emphasizes patient education and a psychodynamic approach to outpatient psychiatry. His passion for empowering patients with knowledge stems from his academic experience in psychiatry residency training. Dr. Tu's practice focuses on blending medication management together with psychotherapy. He also prioritizes collaboration with your therapist and encourages working together as a team. Dr. Tu is a graduate of the University of Chicago Pritzker School of Medicine where he completed an MD and PhD combined program which helped develop his "doctors as teachers” style of practice. Dr. Tu completed his psychiatry residency training at Loyola University Medical Center in Illinois. Dr. Tu served as an Associate Program Director of Loyola's Psychiatry residency training program for two years, and now maintains an Affiliate Assistant Professor of Psychiatry role with Loyola. He continues to contribute to residency training, as well as mentorship of medical students and psychology externs. Over the years, Dr. Tu has received several awards that demonstrate his affinity for teaching, including the Educator of the Year Award in 2022 from the Loyola Psychiatry Residency Program. Areas of specialization include psychopharmacology, patient-centered medicine, and combination treatment of psychiatry and psychotherapy. Dr. Tu understands that medications are not the end-all-be-all of treatment, but just the beginning. For trauma and acute stress, he understands that the journey starts at the tip of the iceberg, with much to explore as you feel more ready.

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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Trudy Warner-Phillips, PMHNP, is a board-certified psychiatric nurse practitioner with over 25 years in nursing and 7+ years in psychiatric care. Her experience spans outpatient, inpatient, and telehealth settings, where she treats conditions such as anxiety, depression, PTSD, mood disorders, and ADHD. She is passionate about delivering thoughtful, evidence-based care in a supportive and accessible virtual environment.

Trudy’s approach is grounded in trust, respect, and collaboration. She values open, honest communication and aims to create a space where clients feel heard, safe, and empowered. By understanding each person beyond their symptoms, she tailors care to support individual challenges, strengths, and goals.

Initial sessions involve a thorough assessment of medical and psychiatric history, current concerns, and past treatments. Trudy then works with clients to develop a personalized care plan focused on their most pressing symptoms. Her treatment may include medication management, supportive therapy, and lifestyle recommendations to promote lasting emotional well-being.

Education and training

Stony Brook University (Bachelor of Science)

American University of Integrative Sciences (MD)

Davenport University (MBA)

Bergen New Bridge Medical Center (residency)

University Hospitals Cleveland Medical Center/Case Western Reserve University (fellowship)

Dr. Mohammed Islam is board certified in both General Psychiatry and Child and Adolescent Psychiatry. He completed his undergraduate studies at Stony Brook University and attended medical school at the American University of Integrative Sciences. He completed his psychiatry residency training at Bergen New Bridge Medical Center followed by completion of a fellowship in Child and Adolescent Psychiatry at University Hospitals/Case Western Reserve University where he served as Chief Fellow. Prior to joining Talkiatry, he has trained/worked in a combination of various healthcare systems across New York, New Jersey, Ohio and Kentucky.

Dr. Islam treats patients of various ages- in addition to medication management he is a strong proponent of therapy in various forms. His approach to the treatment of adults and children/adolescents incorporates the impact of various things such as family history of mental health/medical conditions as well as any adverse childhood experiences/trauma. In addition to screening for common conditions such as bipolar disorder, anxiety and depression in all patients, he also emphasizes the importance of screening for conditions that can manifest in childhood (such as ADHD, Autism) as well as first-episode psychosis in young adults.

From the initial visit and onward, Dr. Islam prioritizes a collaborative effort with his patients (and at times their families). In addition to medication adjustments, he emphasizes the importance of optimizing additional tools such as therapy while making appropriate lifestyle changes. During every follow up visit, he takes care to ensure that the current treatment is not hindering his patient’s progress in any way.

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Dr. Luna Sanchez Rivera holds the position of Staff Psychiatrist at Talkiatry. After completing residency in 2016 at the Ponce Medical School Psychiatry Residency in Puerto Rico, she then moved to North Carolina to complete a subspecialty in Child and Adolescent Psychiatry at Duke University Health System. There, she transitioned into an assistant professor position, focused on structuring pediatric emergency psychiatric services, and helped support the consult and liaison pediatric service. Her years of experience have included working as an integrated care child psychiatrist within outpatient clinics at Duke University Health System, and she trained and worked as a staff psychiatrist at the Inpatient State Facility in North Carolina. She also served in the Dayton Children's Hospital outpatient clinics in Dayton, Ohio, the Appalachian Health System outpatient clinics in Linville, North Carolina, and more recently has been serving the Child and Adolescent inpatient population in Bangor, Maine. Dr. Sanchez Rivera has an approachable style aimed at providing a comprehensive evaluation for all age ranges and is comfortable managing various levels of diagnostic complexities. She provides supportive psychotherapy while using psychodynamic therapy skills to clarify her patient's constellation of symptoms, identify unifying themes and provide thorough psychoeducation throughout the process to drive positive outcomes. She integrates psychodynamic medication management approaches and is adept at family therapy interventions.

Dr. Sophia Monsour holds the position of Chief Psychiatrist for Pennsylvania at Talkiatry. After completing residency in 2013 at Albany Medical Center, she has spent the past 9 years fulfilling her passion for integrated and specialty care for adults suffering from mental illness. Her years of experience have included working as an integrated care Psychiatrist at a community health center, a medical director of a Partial Hospital and Intensive Outpatient Program (PHP/IOP), and also working for an Assertive Community Treatment Team (ACT) specializing in the Serious Mentally Ill (SMI) population. Most recently, she has been serving our veterans as the Outpatient Section Chief, Primary/Mental Health Integration Medical Director and Resident/Medical Student Coordinator at VA Pittsburgh. Dr. Monsour has an approachable style when treating individuals who suffer from various diagnoses, especially those with prior trauma. She provides supportive psychotherapy and at times uses psychodynamic therapy skills to address her patient's current stressors and to identify the root cause of their ailment. She believes in a holistic approach and utilizes mindfulness as a technique along with medication management.