Cassandra Thomas-Jingles, PMHNP

Dr. Ritchie is trained in both adult and child & adolescent psychiatry, with a focus on the diagnosis and treatment of depressive disorders, anxiety disorders, trauma- and stressor-related disorders, and ADHD.  He received his bachelor's degree in biology with a minor in French, from The University of Central Florida. Dr. Ritchie completed medical school at Campbell University School of Osteopathic Medicine. Following medical school, he completed General psychiatry residency and Child and Adolescent Psychiatry Fellowship at Texas Tech University Health Sciences Center. His professional experiences include working in inpatient psychiatric hospitals, consult-liaison psychiatry, outpatient clinics, intensive outpatient programs (IOP), partial hospitalization programs (PHP), and emergency rooms. This broad range of experience allows him to provide comprehensive, individualized care to patients at all stages of life.

Dr. Ritchie emphasizes a holistic approach, combining medication management and psychotherapy. He utilizes principles from Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), and supportive psychotherapy This method is supported by research indicating improved patient outcomes.

Patients can anticipate a thorough initial evaluation during their first visit with Dr. Ritchie. He conducts a comprehensive assessment to understand the patient's symptoms, history, and personal circumstances. This session sets the foundation for collaboratively developing an individualized treatment plan focused on the patient's specific needs and goals.

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Dr. Zeshen Wu is an ABPN board certified psychiatrist with more than 10 years of experience. He completed his undergraduate studies at the University of Texas at Austin, followed by medical school at the University of Texas Medical Branch. He completed residency in psychiatry at Dell Medical School in Austin. Dr. Wu focuses on effective and safe medication management as well as supportive and psychodynamic therapy in his practice. He likes to focus on a gentle, collaborative, and patient-centered approach. He specializes in forming individualized pharmacological treatments as well as taking time to explore stressors and psychological issues to achieve complete and comprehensive care. Dr. Wu had previously served as assistant professor of psychiatry at UTHealth McGovern Medical School in Houston and has been involved in many years of teaching and mentorship. At UTHealth, he also served as clinical faculty in one of the nation's largest inpatient psychiatric campuses and is experienced in treating a wide range of adult mental illnesses including mood disorders, anxiety, OCD, and ADHD.

Sheena Mammen is a Licensed Clinical Social Worker with seven years of experience in various aspects of mental health. She earned her undergraduate degree from Nyack College and her Master's from Stony Brook, which deepened her understanding of the field. She specializes in treating clients with anxiety, depression, ADHD, interpersonal issues, and perfectionism. Sheena employs culturally sensitive and person-centered approaches to tailor treatments for each individual. Her eclectic therapeutic style is rooted in Cognitive Behavioral Therapy, Dialectical Behavioral Therapy, and Attachment Therapy. She also incorporates communication skills, mindfulness, executive functioning, and social skills training into her sessions, fostering comprehensive support for her clients.

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.

Shaneika Lindsay, PMHNP, is a board-certified psychiatric nurse practitioner dedicated to providing personalized and empathetic care to those in need of mental health care. Her academic journey began with a B.S. in Biology from the University at Albany. She later received her B.S. in Nursing from Pace University and attained her Psychiatric Mental Health Nurse Practitioner M.S. from Hunter-Bellevue School of Nursing, graduating magna cum laude. Shaneika's practice focuses on medication management. Occasionally, Shaneika may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. For the last seven years, Shaneika has diligently provided care to our nation's veterans, working on a dual diagnosis inpatient psychiatric unit in the VA New York Harbor Healthcare System. In her time at the VA, she has gained extensive experience in managing substance abuse and co-morbid psychiatric disorders. In addition, while attending Hunter College, she completed a yearlong clinical rotation at Casa Promesa, a mental health outpatient and inpatient facility that services some of the most vulnerable and underserved populations in the South Bronx. As a Nurse Practitioner, her primary focus is holistic care, taking into consideration all physical, psychological, interpersonal, and environmental factors when creating unique treatment plans. She strongly believes that all of these factors are interconnected and play a significant role in any individual's mental health and vitality. Shaneika's goal is to work with clients to create a safe, non-judgmental, and collaborative treatment environment that promotes sustained healing and positive self-development.

Dr. Seth Flesher is double board-certified in adult psychiatry and addiction medicine.  Dr. Flesher’s practice focuses on medication management of psychiatric illness without the use of controlled substances.  Typically, he offers this in conjunction with supportive or emotionally focused therapy in 30-minute follow-up visits. However, occasionally Dr. Flesher may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome.

Before joining Talkiatry Dr. Flesher was Medical Director of Advanced Psychiatric Services [complex/high profile cases] at Kings County Hospital and Unit Chief of the Covid19 positive unit.  He was also a clinical professor at Downstate Medical College where he was voted educator of the year numerous times by psychiatric residents and medical students.  Dr. Flesher is a graduate of the prestigious combined 6-year BS/MD program at The Sophie Davis School of Biomedical Education.  He did research at the neuropsychiatric branch of the National Institute of Mental Health, completed his psychiatric residency at St. Lukes/Roosevelt Hospital, and he received his master’s degree in public health from Columbia University.

Dr. Flesher believes that psychiatry should start with a thorough assessment to arrive at an accurate diagnosis.  Then a discussion with the patient of the different evidence-based options available.  Followed by shared decision-making to arrive at an effective treatment plan to achieve the goals that the patient identifies as being important.  This should be done in an honest, open, non-judgmental, but realistic environment.  Understanding that the ultimate goal is to get the patient to a position where they will no longer need medication and/or therapy.