Dr. Narinder Singh is a board-certified Physician with expertise in Family Medicine, Hospital Medicine, and Addiction Medicine. He has served as an Assistant Professor at California University of Science and Medicine, Department Chair and Attending Hospitalist at San Dimas Community Hospital, and also provides comprehensive outpatient care through his private practice in Pacific Palisades. With a strong focus on evidence-based and patient-centered care, Dr. Singh specializes in chronic disease management, preventive medicine, behavioral health integration, and substance use disorder treatment, including medication-assisted therapies such as Vivitrol and Sublocade. His clinical interests include ADHD, anxiety, depression, neurodevelopmental disorders, and integrated behavioral health care. Trained at UC Irvine in both Addiction Medicine and Child & Adolescent Psychiatry, Dr. Singh brings a compassionate, evidence-based approach to managing co-occurring psychiatric and substance use disorders across all age groups-including Vivitrol and Sublocade medication-assisted treatment-backed by significant clinical research experience.