Anastasia Ruiz, MD

Dr. Jennifer Shoenfelt is a staff psychiatrist at Talkiatry. She is double board certified in child and adolescent psychiatry and adult psychiatry. She has been practicing for over 14 years. Dr. Shoenfelt's practice focuses on child and adolescent medication management. Typically, she offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. However, occasionally Dr. Shoenfelt may believe that additional therapy is needed and will ask that you bring a therapist into your care team to provide the best outcome. She provides treatment plans that include holistic recommendations for diet, exercise, and educational and psychosocial/spiritual aspects of care. She is known for listening to and respecting patients' stories and walking them on a path of recovery and growth. Dr. Shoenfelt received her medical degree from the Boonshoft School of Medicine at Wright State University in Dayton, Ohio. She earned her Bachelor of Science degree in Physical Therapy from The Ohio State University. Dr. Shoenfelt practiced for 14 years in physical therapy with a specialization in children with developmental and neurological disabilities before attending medical school. Dr. Shoenfelt has held multiple positions in hospital and outpatient psychiatry, including community mental health, developmental and foster care settings, and medical director positions. She has served as clinical faculty for both the Wright State Department of Psychiatry and the University of Cincinnati School of Medicine. She has a passion for the education of medical students, residents, and patients. Dr. Jennifer Shoenfelt is a staff psychiatrist at Talkiatry. She is double board certified in child and adolescent psychiatry and adult psychiatry. She has been practicing for over 14 years.

Dr. Sahadevan took an adventurous path to Talkiatry. After perhaps thinking a little too hard about Intro to Philosophy in college - "the unexamined life is not worth living” - he first used his chemistry degree to work in pharmaceutical research. He changed course, working in computer network engineering, before deciding to find a more meaningful path. He worked as an EMT, then earned a Master's in Physiology before finally landing in medical school at Ohio State. Finding a surprising interest in psychiatry, he stayed at Ohio State for residency, and then a fellowship in forensic psychiatry. He is board-certified in both Psychiatry and Forensic Psychiatry. He previously worked as a forensic psychiatrist and evaluator at Ohio's maximum-security state psychiatric facility, as an attending psychiatrist running an inpatient unit for violent or dangerous patients, performing court-ordered evaluations, writing reports, and testifying when necessary. Dr. Sahadevan has also worked as a consultation-liaison psychiatrist, performing psychiatric consults at several general hospitals in Central Ohio's largest hospital system. He found great enjoyment in teaching successive generations of residents and medical students, serving as an adjunct faculty member at Ohio State, Ohio University, Wright State, and OhioHealth Riverside Methodist Hospital. He is excited for the next chapter of his journey, exploring another area of psychiatry at Talkiatry!

Dr. Antonio Ramirez earned his medical degree from Ponce Health Sciences University, where he also served as Chief Resident in Psychiatry. He completed residency training at Ponce Health Sciences University and the U.S. Veterans Health Administration, Caribbean Healthcare System, followed by a Fellowship in Consultation–Liaison Psychiatry at Montefiore Medical Center, Albert Einstein College of Medicine. Board-certified in both Psychiatry and Consultation–Liaison Psychiatry, he has served as Director of Psychiatry at the Roberto Clemente Center and Clinical Assistant Professor at NYU Grossman School of Medicine. Dr. Ramirez is bilingual in Spanish and bicultural, with published research in cultural psychiatry and stress biology, and has been recognized for teaching and leadership.

Dr. Ramirez focuses on compassionate, evidence-based care that integrates psychotherapy and psychotropic medications to promote recovery and growth. His collaborative and respectful style ensures patients feel heard while working toward meaningful goals. He emphasizes setting clear expectations from the start to foster confidence and engagement. With his background in consultation–liaison psychiatry, Dr. Ramirez brings expertise in caring for individuals managing psychiatric conditions alongside significant medical illness.

The first appointment is a comprehensive evaluation, during which Dr. Ramirez carefully explores a patient’s history, conditions, and symptoms. Based on this, he develops a personalized treatment plan and reviews it collaboratively, so expectations are clear. Future visits focus on monitoring progress, adjusting the plan as needed, and integrating both psychotherapy and medication management to best support the patient’s needs and long-term growth.

Dr. Holly Shiao is a psychiatrist who has worked extensively with medically complex patients, including a special focus in psycho-oncology with cancer patients. She is double board-certified in Consultation-Liaison Psychiatry and Adult Psychiatry. She has been practicing for over 7 years. Before Talkiatry, Dr. Shiao worked as an Assistant Professor at the University of Washington and Fred Hutchinson Cancer Center. She also worked as an Assistant Professor and was Director of Emergency Psychiatry at the University of Chicago. She has presented nationally at the Academy of Consultation-Liaison Psychiatry and written a book chapter about psycho-oncology. Dr. Shiao attended medical school at John P. and Kathrine G. McGovern Medical School at the University of Texas Health Science Center at Houston. She then completed an Adult Psychiatry residency at the University of Texas Medical Branch at Galveston, followed by a Consultation-Liaison fellowship at Dell Medical School at the University of Texas at Austin. Dr. Shiao is interested in the mind-body connection in overall emotional and mental well-being. She likes to integrate therapy modalities, such as cognitive behavioral therapy, supportive therapy, mindfulness and meditation with medication management to optimize a patient's mental health.

Dr. Leslie Chavez is a board-certified adult psychiatrist with a diverse background in clinical and academic medicine. She completed her medical school and residency at the University of New Mexico, where she later served as a psychiatrist and assistant professor, treating high-need patients and teaching residents and medical students. During the pandemic, she transitioned to telehealth and has been dedicated to this field for the past four years. Dr. Chavez is known for making her patients feel seen and heard, using both medication management and supportive psychotherapy. Dr. Chavez began her academic journey as a physics major at UNM and then studied biophysics at the University of San Diego, California. During her postdoctoral fellowship at Los Alamos National Laboratories, she was inspired by presentations about professionals working with patients in African countries, which sparked her interest in medicine. During this time, her father died of cancer, and she saw the impact of mental health therapy on his quality of life, further solidifying her motivation to attend medical school. Witnessing the profound impact of mental health on her patients and family, she specialized in psychiatry. Dr. Chavez is a seasoned psychopharmacologist and emphasizes the importance of nutrition, exercise, and community in mental health. She enjoys all aspects of medicine and combines her extensive knowledge with a patient-centered approach.

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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