Vandana Kethini, MD

Dr. Tangeneare Singh earned a BS, Summa Cum Laude, from Tuskegee University and an MD from University of Chicago Pritzker School of Medicine. Commissioned in the United States Army, she completed psychiatry residency and child and adolescent fellowship at Walter Reed Army Medical Center. She later led Behavioral Health at Blanchfield Army Community Hospital and served 15 years as Department Chief at Alexander T. Augusta Military Medical Center, expanding key programs and mentoring staff and trainees. She retired as a CAPTAIN (O6) in 2026 with over 20 years of practice.

Dr. Singh provides a safe, nonjudgmental space where patients and families can openly share concerns. She partners with them to select evidence-based treatments that best address their symptoms and goals.

She begins with a thorough discussion of strengths, stressors, and biological and social factors to determine safety and level of care. Together, they develop a plan that may include medication, therapy, or referrals, with testing as indicated. Follow-ups include symptom review, plan adjustments, and attention to sleep, exercise, nutrition, hydration, and basic needs.

Dr. Kristofer Joondeph-Breidbart is a board certified adult psychiatrist. He earned his undergraduate degree and Master's in Teaching from Boston University, followed by his medical degree from the University of Massachusetts Medical School. Dr. Joondeph-Breidbart completed his residency in general adult psychiatry at Cambridge Health Alliance, a Harvard teaching hospital. Currently, Dr. Joondeph-Breidbart serves as a staff psychiatrist at Harvard University Health Services, where he works with both undergraduate and graduate students. He has developed significant expertise in working with LGBTQ individuals through his involvement with the Gender and Sexuality Clinic at Cambridge Health Alliance and the LGBTQ Interdisciplinary Team at Harvard University Health Services. While he has extensive expertise in treating college-aged young adults, his practice also includes a broad range of patients, with a particular specialization in Obsessive-Compulsive Disorder (OCD). He is trained in Exposure and Response Prevention Therapy, a highly effective treatment for OCD. Dr. Joondeph-Breidbart takes a holistic approach to mental health care, integrating therapy into his sessions and collaborating with patients to develop individualized medication regimens that best meet their needs. His gentle and understanding approach helps create a supportive environment for his patients, fostering their mental and emotional well-being.

Dr. Tiffany Abtahi is board certified in adult psychiatry and has been in practice for over 6 years. She completed her residency at Icahn School of Medicine, Elmhurst Hospital Center program where she served as Chief Resident in her final year. After completing her residency training, Dr Abtahi worked as a staff psychiatrist in the VA Medical Center focusing on PTSD, depression, and anxiety. Dr. Abtahi has held an academic appointment at the University of UT Southwestern medical school and has spent her professional career supervising/teaching medical students and psychiatry residents. Dr. Abtahi's practice focuses on medication management and providing psychoeducation to her patients. However, if indicated, Dr. Abtahi may believe that additional therapy is also needed and ask that you bring a therapist into your care team to provide the best outcome. Dr. Abtahi has experience treating a large variety of mental health conditions across a variety of populations. She strongly believes in tailoring treatments through a holistic and patient-centered approach based on individual and multi-faceted histories. Dr. Abtahi looks forward to working with you.

Avi Adri is a board-certified psychiatric nurse practitioner with a passion for helping others achieve their goals through medication management and psychotherapy. He is trained in cognitive behavioral therapy, psychodynamic therapy, and supportive therapy. Avi has experience supporting individuals with depression, anxiety, OCD, bipolar disorder, PTSD, and ADHD. He is an LGBTQIA+ affirming provider who believes in empowering individuals in their lives.

He earned his Master of Science in Nursing with a specialty in psychiatry from Stony Brook University and a nursing practice degree from Chatham University. Avi is committed to providing evidence-based, compassionate treatment for mental health conditions to enhance quality of life. His previous experience includes two years at Columbia University Medical Center on an inpatient psychiatric unit and four years on the medical consultation-liaison psychiatric team, where he treated patients with a range of acute and chronic medical conditions while providing medication management and psychotherapy. His work at Columbia involved treating a wide spectrum of psychiatric conditions with the goal of achieving symptom remission.

Additionally, Avi has practiced at a private clinic in New York City, focusing on interventional techniques such as TMS and ketamine therapy, alongside medication management and psychotherapy.

Through mindful techniques and compassionate care, Avi is dedicated to the well-being of his clients. He views each person as more than a diagnosis and approaches care through a client-centered, holistic lens.

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Dr Mark Giordano is a board-certified psychiatrist with over ten years of experience in adult psychiatry, addiction medication, pregnancy and post-partum care, complex medical consultation, and military health. Dr G practices psychodynamic psychotherapy as well as evidenced based medication management. Dr G has extensive experience working with culturally diverse populations, and is an Army veteran who deployed to Korea and Afghanistan.

Patients often describe Dr G as caring, providing clear explanations, and responsive to concerns.   Dr G highly values his patients trusting him to listen and respect them, as well as in his clinicial skills.  He works hard at helping his patients understand his approach to treatment, and what is happening along the way and why. He may be the medical expert, but he and his patients are partners working together in the process of achieving better health and functionality for them so they can live their best lives.

Dr G starts by explaining his overall approach to medication management and his goal of helping his patients live a better life free of disability. He conducts a detailed evaluation of your concerns, your experiences, and your priorities in treatment.  Dr G develops a unique treatment plan based on your unique needs. He emphasizes positive developments over the course of your work together and makes sure you always have a chance to discuss any questions or concerns you want him to know and answer.

Dr. Michele Wiener is a psychiatrist with over 35 years of experience treating patients with mental health issues. Dr. Wiener's practice has historically focused on treating patients with varying mood disorders, anxiety disorders, psychotic disorders, and post-traumatic stress disorder, often complicated by substance use disorders. Dr. Wiener enjoys working with patients of all ages. She is skilled in both psychotherapy and medication management. While the emphasis will generally be on medication management, Dr Wiener will utilize insight-oriented, cognitive behavioral, and supportive psychotherapy skills to help her patients reach their treatment goals. She completed her internship at Bronx Lebanon Hospital, her residency at Montefiore Medical Center and a two-year fellowship in biological psychiatry, psychopharmacology and geriatric psychiatry at Albert Einstein College of Medicine. She served for over 20 years as Chief of Psychiatric Services for Behavioral Health Services at St John's Riverside Hospital Park Care Pavilion formerly Yonkers General Hospital. Here she was also able to enjoy teaching medical students from The Lake Erie College of Osteopathic Medicine in their psychiatric rotation. She has been Assistant Medical Director for Arms Acres, in Carmel, NY for over five years.