Ioana Horotan-Enescu, DO

Dr. Alfers is a board-certified psychiatrist specializing in adult psychiatry. He has been practicing for over 11 years. He completed his undergraduate education at Virginia Tech, graduating Cum Laude with degrees in Biology and Chemistry. Following graduation, he attended a research internship at the National Institutes of Health where he received a Post-baccalaureate Intramural Research Training Award. Dr. Alfers completed his medical degree from the Western University of Health Sciences in Pomona, CA. He completed his General Psychiatry Residency at Georgetown University, where he served as Chief Resident. After residency, he entered private practice in McLean, VA. Dr. Alfers takes a comprehensive approach to patient care. He integrates biological, psychological, and environmental factors into treatment planning. He focuses on developing a meaningful therapeutic relationship and providing medication interventions for specific treatment goals. Dr. Alfers provides interpersonal psychotherapy in conjunction with medication management services. Dr. Alfers has a special interest in the treatment of multiple mental health conditions, including depression, anxiety, bipolar disorder, PTSD, ADHD, and OCD. Dr. Alfers treats adults ages 18 to 65 years old. For established patients of Dr. Alfers, please call 917-634-5311 to schedule an appointment and let the care coordinator know you are an established patient.

Sibi Selvarajah is a Licensed Clinical Social Worker (LCSW) renowned for his compassionate approach and dedication to fostering emotional well-being. Sibi's career in mental health has been marked by a dedication to evidence-based practice and a client-centered approach. His experience working as a group and individual counselor at a private substance abuse outpatient treatment center in Manhattan provided him with invaluable knowledge and insight into helping individuals struggling with substance use disorder, anxiety, depression, trauma, and relationship issues, among others. Sibi earned his Bachelor's degree in Psychology from New York University, where he developed a strong foundation in psychological theories and practices. He went on to complete his Master's degree in Social Work at Yeshiva University, gaining advanced knowledge and hands-on experience in therapeutic techniques. As a licensed clinical social worker, Sibi is known for his empathetic listening skills and his ability to build strong therapeutic alliances with his clients. His therapeutic approach is integrative, drawing from multiple modalities to tailor treatment plans that best meet the unique needs of each individual. Outside of his professional work, Sibi is dedicated to continuous learning and personal growth. He regularly attends workshops and conferences to stay abreast of the latest advancements in mental health therapy. Sibi also believes in the importance of self-care and encourages his clients to engage in practices that promote overall well-being. Through his work, Sibi Selvarajah continues to make a profound impact on the lives of those he serves, helping them navigate their mental health journeys with hope and resilience.

Karen Tonner, MSN, PMHNP-BC is an ANCC board-certified Psychiatric Mental Health Nurse Practitioner with over eight years of experience providing psychiatric care in outpatient and community mental health settings. She works with patients across the lifespan and treats a broad range of mental health conditions, including depression, anxiety disorders, attention-deficit/hyperactivity disorder (ADHD), obsessive-compulsive disorder (OCD), and post-traumatic stress disorder (PTSD).

Karen primarily provides medication management in conjunction with supportive therapy, using evidence-based practices to help patients achieve symptom relief and improved functioning. Her approach to care is holistic, person-centered, and collaborative, emphasizing shared decision-making and individualized treatment planning. She strives to create a welcoming, approachable, and supportive environment where patients feel comfortable being themselves and actively participating in their care. She believes that understanding each patient’s unique experiences, goals, lifestyle, and strengths is essential to effective mental health treatment.

Karen earned her Bachelor of Science in Nursing from Kennesaw State University and her Master of Science in Nursing from the University of Alabama at Birmingham. She is dedicated to continuing education to remain current with psychiatric research and is committed to delivering compassionate, high-quality care that helps patients feel heard, respected, and empowered.

Brian F. Lann, MA, LPC, LPC-S, LAC, is a licensed mental health professional with over 23 years of experience across outpatient, inpatient, and telehealth settings. He specializes in substance use disorders and complex conditions including OCD, anxiety disorders, and Major Depression. Brian is trained in CBT, ERP, HRT, DBT, and trauma-focused therapies, and has completed extensive specialized training in evidence-based interventions for OCD and related disorders.

Brian provides a structured, compassionate, and collaborative approach to care. He believes in meeting patients where they are while offering practical tools that create meaningful change. He emphasizes accountability, skill-building, and measurable progress, particularly in treating addiction, OCD, anxiety, and trauma-related concerns.

Brian begins with a comprehensive assessment to clarify goals and develop an individualized treatment plan. He integrates evidence-based modalities such as CBT, ERP, and trauma-focused therapies, with ongoing evaluation of progress. Treatment includes clear goal setting, skill practice between sessions, and coordinated care when appropriate.

Dr. Jason Chin earned his Bachelor’s degree from Duke University and his M.D., along with completing his psychiatry residency, at Wake Forest University School of Medicine. He is board-certified in psychiatry and brings extensive experience from both outpatient and inpatient settings. He also specializes in interventional treatments, including Electroconvulsive Therapy (ECT) and Transcranial Magnetic Stimulation (TMS).

Dr. Chin values patient autonomy and strives to provide the knowledge needed for patients to make informed decisions. He prioritizes building a strong therapeutic alliance and integrating evidence-based medicine to guide care.

Dr. Chin begins by listening to the patient’s full story to understand them as a whole. He explores their past, present, and future to create a comprehensive treatment plan designed to empower patients to move forward and improve their mental health.

America Calderon is a bilingual, National Certified Counselor (NCC), Licensed Mental Health Counselor in the state of New York with experience providing services for children, adolescents, and adults. America specializes in the treatment of anxiety, depression, trauma, adjustment disorders, life transitions, stress management, and other comorbid disorders. She holds a BA in Psychology from the University of Central Florida and a MSEd. in Clinical Mental Health Counseling from St. John's University in New York. America provides patients with a genuine, nonjudgmental, and supportive environment to help empower them and recognize their potential. She utilizes various treatment modalities which include Cognitive Behavioral Therapy, Motivational Interviewing, Mindfulness, and Relational-Cultural Therapy techniques. She practices from a person-centered and multicultural approach to build a meaningful, therapeutic relationship. Prior to becoming licensed as a psychotherapist, America was an educator in the state of Florida and New York with over 5 years of experience in the field. She is passionate about providing psychoeducation as it increases our insight into various mental health issues.