Jenny Joseph, MD

Dr. Cheryl Person is the National Director of Clinical Quality at Talkiatry. She is board certified in general adult psychiatry and has been in practice for 20 years. Dr. Person focuses on medication management but believes that is only part of successful treatment. She will spend her time providing motivational interviewing or supportive therapy, and believes it is often critical to have a therapist as part of the treatment team. Dr. Person received her medical degree from Tulane University School of Medicine. She completed her psychiatric residency at Johns Hopkins and a psychiatric epidemiology fellowship at Johns Hopkins Bloomberg School of Public Health with a focus on disaster mental health. After relocating to Texas in 2010, she worked as Director of Psychiatric Services of a large safety-net hospital in Houston. Prior to Talkiatry, she most recently was the executive director/chief physician of a large university student health center and campus pharmacy. In addition to adult psychiatry, Dr. Person has worked extensively with victims of acute trauma and her primary focus is on working with patients who have anxiety and mood disorders.

Dr. Phelps is a board-eligible adult psychiatrist. She was elected chief resident by her residency program at the University of Central Florida. She obtained her medical degree at Nova Southeastern University. She graduated magna cum laude with a bachelor's degree in Kinesiology from Louisiana State University. Dr. Phelps believes in patient-centered care and a holistic approach to medicine. Her practice focuses on medication management, in conjunction with supportive therapy in 30-minute follow-up visits. If additional therapy is needed, she utilizes referrals to psychotherapists to enhance management of mental illness and provide the best treatment outcomes. Dr. Phelps has worked in a variety of medical settings with different patient populations, including outpatient, consult liaison, and inpatient psychiatry. Her primary focus is treating adults with depression, anxiety, ADHD, insomnia, and bipolar disorder. Dr. Phelps aims to build a strong therapeutic relationship and improve the quality of life of her patients.

Background and credentials

Dr. Gerald Matthews is a board-certified adult psychiatrist. He earned his medical degree from the University of Louisville School of Medicine in Louisville, KY. Following medical school, he entered active duty service in the U.S. Army, where he completed his psychiatry residency at Tripler Army Medical Center in Honolulu, HI. After completing his training, he practiced as a staff psychiatrist at Fort Hood, TX, fulfilling his service obligation.

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Treatment approach

Dr. Matthews specializes in medication management, working primarily with adult patients in an outpatient setting. While his primary focus is pharmacological treatment, he frequently collaborates with therapists to provide comprehensive care when indicated. He has extensive experience treating civilians, active-duty military personnel, and veterans, addressing conditions such as mood and anxiety disorders, psychosis, and trauma-related disorders.

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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. Matthews takes time to understand their history, symptoms, and treatment goals. He provides a structured yet compassionate approach to care, discussing medication options and potential therapeutic interventions. For patients who may benefit from additional therapy, he collaborates with therapists to ensure a well-rounded treatment plan 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. Macdonnell is a double-boarded psychiatrist with over 25 years of experience in adult psychiatry and geriatric psychiatry. Dr. Macdonnell focuses on treating individuals with medication management. Supportive and interpersonal therapy is incorporated as needed. When additional therapy or longer sessions are necessary to enhance the individual's treatment, she invites a therapist to become a member of your care team. Dr. Macdonnell attended undergraduate school at Manhattan School of Music earning a bachelor's and master's degree in violin performance and musicology. She then attended the City University of New York � Hunter College campus majoring in premedical sciences. Dr. Macdonnell attended Albert Einstein College of Medicine in the Bronx, New York, earning a degree in MD. She completed an internship in internal medicine before entering psychiatry residency at New York-Presbyterian Hospital � Westchester Division. After completing her residency, she stayed for an additional year, completing a fellowship in geriatric psychiatry. She was promoted to Attending Psychiatrist and Unit Chief of the Geriatric Partial Hospital Program. After two years in academic psychiatry, she entered private practice in New York and Connecticut for 8 years. She then served 2 years in the National Health Service providing outpatient care to an underserved area in central Florida. Moving to Georgia, she has worked in private practice and academic psychiatry at Mercer University College of Medicine before moving on to Veterans' care at Atlanta VA and Carl Vinson VA Medical Center. While Dr. Macdonnell has a wide range of experience, she focuses on general adult psychiatry.

Dr. Absar Tahir is an adult psychiatrist double-boarded in psychiatry and internal medicine who specializes in evidence-based, holistic, and individualized care. He graduated from the University of Alabama at Birmingham, where he earned both his undergraduate and medical degrees. Dr. Tahir completed sequential residency training in both internal medicine at the Mayo Clinic in Rochester, Minnesota, followed by psychiatry at Emory University in Atlanta, Georgia. Dr. Tahir integrates his knowledge of psychiatry and internal medicine to address the complex interplay between mental and physical health, ensuring a comprehensive and thoughtful approach to diagnosis and treatment. Throughout his career, he has helped patients from all walks of life, from diverse backgrounds, with a compassionate and empathetic treatment style. He strives to ensure his patients feel their voice is heard while working collaboratively towards achieving their treatment goals. As a psychiatrist, he specializes in the treatment of depression, anxiety disorders, bipolar disorder, obsessive-compulsive disorder (OCD), post-traumatic stress disorder (PTSD), and attention-deficit/hyperactivity disorder (ADHD). He is also highly experienced in treating psychiatric problems in patients with medical comorbidities.

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 before recognizing the urgent need for accessible mental health services. This led her to pursue a post-master’s certification in psychiatry, allowing her to provide comprehensive psychiatric care. Margaret has extensive experience treating patients in both inpatient and outpatient settings, addressing conditions such as depression, anxiety, PTSD, mood disorders, and substance use disorders.

Margaret believes in a collaborative, patient-centered approach to mental health care. She strives to create a safe and supportive space where patients feel heard and empowered to take an active role in their treatment. With a strong emphasis on holistic care, she 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 treatment goals. She then works closely with them to develop an individualized care plan that may include medication management, therapy, and evidence-based lifestyle interventions. She prioritizes open communication, patient education, and ongoing collaboration to ensure that treatment remains effective and evolves with each patient's needs. Through her compassionate and evidence-based approach, Margaret is dedicated to helping patients find balance and improve their overall quality of life.