Marc Whaley, MD

Dr. Sierra-Cintron is board-certified in adult psychiatry by the American Board of Psychiatry and Neurology and has been in practice for 12 years. Dr. Sierra-Cintron focuses her practice on medication management. She also engages in supportive therapy in a comprehensive way, focusing on the patient as a whole and not just the symptoms. Dr. Sierra-Cintron has a broad understanding of vitamin support as an adjunctive treatment to traditional medication. She has broadened her understanding of second-line treatment, having been certified in Electroconvulsive Therapy (ECT), conducting clinics in Clozapine and Long-Acting Antipsychotics (LOA), and even conducting assessments for patients interested in weight loss surgery. Dr. Sierra-Cintron has a comprehensive approach to treatment, and might consider the addition of therapy, either by referral or collaborating with an existing therapist for a more rounded approach and improved outcome. Dr. Sierra-Cintron received her medical degree from the Universidad Central del Caribe located in Bayamon, Puerto Rico. Upon graduation, she relocated to Philadelphia, where she started her residency program at Einstein Medical Center. After completing her training, she worked for 8 years in a community mental health clinic, treating an underserved population in all modalities of psychiatric care. In her 12-year career, Dr. Sierra-Cintron has treated both adult males and females, including seniors. This has led to varied and wide-ranging diagnoses during the length of her career. After leaving the community clinic setting, she started working for an outpatient clinic in a suburb of Philadelphia. Dr. Sierra-Cintron's current areas of focus are adults with Mood Disorders, Anxiety Co-Occurring Substance disorders, as well as patients with varied concomitant medical problems.‍

Sonya R. Isler, PMHNP-BC, began her nursing journey over 30 years ago in a state psychiatric hospital in Goldsboro, NC, inspired by the poised nurse she admired at church as a child. Her path includes roles as LPN, RN, BSN, and multiple advanced practice degrees. Sonya has worked in inpatient and outpatient settings, VA clinics, and private practices. She also serves as a preceptor for PMHNP students at her alma mater, the University of North Carolina at Chapel Hill.

Sonya creates a welcoming, respectful space where patients feel safe to communicate openly. She practices active listening and values patient input when setting therapy goals. Her approach is holistic—treating the whole person—and she encourages collaboration, helping patients feel seen, heard, and empowered in their care.

Sonya reviews a patient's history before each session and begins with clear introductions and goal setting. She invites open discussion of concerns and tailors' treatment plans with patient input. She often incorporates CBT, motivational interviewing, and solution-focused therapy into care, promoting growth through supportive, personalized strategies.

Dr. He is board-certified in adult psychiatry and addiction medicine. She is passionate about providing quality and accessible mental health care while considering each patient's concerns, values, and life circumstances. She received her medical doctorate degree from State University of New York (SUNY) Downstate Medical Center, and completed her psychiatry residency at George Washington University Hospital in DC. Prior to medical school, she completed a Master of Public Health from Yale School of Public Health. Dr. He has special clinical interests in providing trauma-informed and culturally competent care in the treatment of mental health conditions. She has experience working with special populations, such as minorities, immigrants, perinatal women, and LGBTQ+ communities. She holds a certificate from Harvard in Global Mental Health: Trauma and Recovery Program. She currently serves on the Board of Directors for a non-profit organization in Washington DC to prepare people recovering from mental illness to improve their quality of life. Although Dr. He's practice primarily focuses on medication management, she looks forward to getting to know you and incorporating her experiences with insight-oriented therapy in 20 or 30 minute follow-up visits.

Languages: English and Burmese

Dr. Pe Win is a board-certified psychiatrist.  He earned his medical degree (M.B.,B.S) from Institute of Medicine (1), Rangoon, Burma.  He went to obtain master’s degree in public health (MPH, Epidemiology and Biostatistics) from New York Medical College, Valhalla, New York.  He worked as a researcher in the area of Behavioral Health associated with drug use among HIV patients and Colombian youth.  He published several papers together with principal investigators on NIMH grants.  He received his residency training in psychiatry at Westchester Medical Center, Valhalla, New York.

Dr. Win has extensive experience in working with veterans (23 years in VA health care system) in outpatient setting. He has plethora of experience in dealing with different levels of PTSD (combat-related and military sexual trauma), anxiety, bipolar disorder, depression, OCD, mood disorders as well as behavioral issues related with memory impairment (e.g. Traumatic Brain Injury and  dementia).      

Dr. Win also worked in inpatient setting for both adolescents and adults for 5 years on a part-time basis in Four Winds Hospital, Katonah, New York.

During the first visit, patients can expect comprehensive interview focusing on patient- center approach.  After attentive, compassionate interview and open communication, patients will be evaluated thoroughly of their symptoms, mental and medical heath history, social history, family history, risk assessment, patient’s goals and needs, and treatment plan will be discussed.

He will provide warm and supportive environment by active listening and giving constructive suggestions.  He will explore possible coping strategies, assess patient’s readiness to change, and provide mindfulness, behavioral modification, CBT, motivational interview as well as medication management emphasizing on personalized treatment plan.

Dr. Win is committed to ongoing follow-up visit, reviewing prior discussions, any changes in patient’s mental/medical condition, stress level, side effects of medication, psychoeducation, coping strategies, psychotherapy, and adjustment of care as needed (medication as well as behavioral therapy)

Dr. David Wait, MD is American Board of Psychiatry and Neurology certified and a fellow of the American Psychiatric Association. A skilled psychopharmacologist and psychotherapist, he has over 30 years’ experience successfully helping people overcome a diverse range of emotional, psychiatric, and addiction challenges.

David was born in Sioux Falls, South Dakota, and is a graduate of Augustana College. He obtained his MD at the USD School of Medicine. His residency was at the University of Arkansas for Medical Sciences (UAMS) in Little Rock where he was trained in both psychotherapy and biological management of psychiatric challenges.

Following residency training, Dr. Wait continued to work with UAMS and the State of Arkansas in research and program development focusing on implementing and then teaching novel strengths focused care for people with severe mental illness for the first 12 years of his career.

Later, Dr. Wait moved with his wife and three children to Coeur d'Alene, Idaho. He has since been in clinical practice and leadership roles in inpatient, outpatient, and telehealth psychiatric care settings.

Rather than focus primarily on illness or problems, Dr. Wait’s approach is to first evaluate his patients comprehensively, then utilize what’s learned from this to treat and empower them to make and then practice choices that lead to improved health and well-being, using an integrative model that recognizes that mental, physical, social, and spiritual health are one.

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Dr. Sujith Maracheril is a board-eligible psychiatrist who provides comprehensive patient care while building a physician-patient relationship centered on communication, empathy, and respect. His primary focus is medication management, and he also provides supportive psychotherapy to help patients work toward long-term improvements. While aligning treatment toward patient goals, he takes a practical approach to changes that can be made to empower patients in their lives. Dr. Maracheril is a graduate of the Sophie Davis Biomedical Education Program at the CUNY School of Medicine, a 7-year BS/MD program. He completed his residency training in psychiatry at the Zucker School of Medicine/Northwell Health at Mather Hospital. He has trained in many settings including inpatient psychiatric units, general and specialized outpatient clinics, and at a partial hospitalization program. Dr. Maracheril has experience treating a broad range of mental health conditions including depressive disorders, bipolar disorder, anxiety disorders, ADHD, and OCD. He understands that people may experience these conditions in different ways, and he aims to treat each patient in an individualized and holistic way.