James Ritchie, DO

Dr. Irene Pastis is a board-certified psychiatrist who specializes in adult psychiatry.  She completed residency training at East Carolina University in both internal medicine and psychiatry.  After residency, she pursued her passion in psychiatry and stayed on as a clinical assistant professor in the department of psychiatry at East Carolina University.  In this role she specialized in treating adults with mental illness in both the inpatient and outpatient settings.  She has spent a considerable amount of time teaching residents and medical students and has published several papers focusing on the neuroscience pathways of mental health conditions.  In her daily practice, Dr. Pastis focuses on evidence-based treatments utilizing the latest clinical guidelines and current approved treatments.  In addition to medication management, she also incorporates psychotherapy in the treatment of mental health conditions.  Dr. Pastis is passionate about taking a collaborative approach with her patients to help them reach their potential.

Dr. Sarah Ramos, MD, has experience practicing in a variety of outpatient settings, including community mental health and military care, serving active-duty service members, their families, and veterans. She earned her medical degree from Vanderbilt School of Medicine and completed psychiatry residency training at the University of California San Diego and Thomas Jefferson University in Philadelphia.

Dr. Ramos values open communication, privacy, and a collaborative approach with her patients. She creates a warm, supportive environment where individuals feel heard, respected, and empowered to participate in their care.

In initial sessions, Dr. Ramos thoroughly assesses patients’ history, concerns, and goals to ensure care is personalized and effective. She develops comprehensive treatment plans that align with each patient’s objectives, providing ongoing support to help them achieve meaningful outcomes.

Dr. Hong Chen is a board certified adult psychiatrist and has been in practice since 2010. Dr. Chen received her doctorate degree in medicine at the University of Florida. She then completed her residency training at the University of Florida, Department of Psychiatry. She is board certified by the American Board of Psychiatry and Neurology.

Dr. Chen has worked mainly in outpatient settings and often tailors individualized treatment to serve the needs of patients with a variety of conditions. She has a lot of experience in treating patients with depression, anxiety disorders, OCD, Bipolar type 2 and ADHD.

Dr. Chen’s practice is based on a holistic approach to mental health care; with special emphasis on self-care, mindfulness practices in addition to medication treatment. Dr. Chen

truly believes that focusing on wellness in conjunction with medication mediated symptom reduction will lead to a better outcome for patients. As a result, patients often enjoy the

supportive therapy, insight-oriented therapy and psychoeducation that is provided to them during their sessions with Dr. Chen.

Dr. Osaji is an Adult Psychiatrist who completed her psychiatry training at Texas Tech University Health Sciences Center, Lubbock, Texas. She served her program as a chief resident, which helped to build her leadership and interpersonal skills. She also dedicated herself to leading her resident team and fostering a supportive learning environment. She received the award of excellence in psychiatry knowledge during her residency training. She also has a Master's in Public Health from Texas Tech University Health Sciences Center and is a Phi Kappa Phi Honor Society member.

Dr. Osaji is an adult outpatient psychiatrist who provides care via telehealth. She strives to create a supportive, collaborative space where patients can explore what's bringing them in and work together to determine the best path forward. Whether someone is new to mental health care or returning after some time away, Dr. Osaji recognizes that it's normal to feel a mix of emotions at the start. She takes a thoughtful, personalized approach to treatment that may include medication, therapy recommendations, or simply creating space to talk. While telehealth offers flexibility and convenience, Dr. Osaji is committed to building a meaningful connection with each patient. She does not provide emergency services between sessions but ensures patients can access the appropriate resources when needed. As someone early in her career, Dr. Osaji brings fresh training and a strong commitment to transparency, lifelong learning, and evidence-informed care. She values open communication and believes deeply in each person's capacity for meaningful change.

Dr. Osaji creates a supportive, collaborative space to help patients explore their mental health concerns and goals. She takes a personalized approach that may include medication, therapy referrals, or check-ins, always valuing patient input. Follow-up visits are 20 to 30 minutes, focusing on monitoring progress and adjusting care as needed. She offers convenient access through telehealth while building meaningful, transparent relationships rooted in respect and growth. Dr. Osaji also values collaborative care and often coordinates with therapists or refers patients to therapy when additional support can enhance outcomes.

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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.

Megan O’Brien is a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP) with experience in inpatient, outpatient, and emergency mental health settings. She earned her NP degree from UCSF, the top-ranked program in the country at the time. In addition to clinical work, she enjoys teaching and is passionate about training the next generation of compassionate psychiatric nurse practitioners.

Megan believes in meeting patients where they are, offering empathy, respect, and acceptance. She values open communication and sees treatment as a collaborative process. Her approach empowers patients to take the lead in their care while she supports them as a partner and guide along the way.

Megan begins by listening carefully to each patient’s story and asking relevant questions to understand their needs. Together, she and the patient build a tailored treatment plan that aligns with their goals. Her focus is on reducing mental health symptoms and helping people experience greater freedom and flexibility in their lives.