Dr. Mastis has dual board certifications in adult and child & adolescent psychiatry. She graduated from Tufts University School of Medicine and completed her residency and fellowship training at UMass Medical School in Worcester. She has been in private practice for 10 years serving as medical director of Pediatric Behavioral Health. She remains an instructor of psychiatry at UMass Medical School. Originally from New York, she has been a proud member of the greater Worcester MA community for the past fifteen years. She offers a personalized, strength-based, holistic approach in her work with patients and families, and is deeply rewarded by her ability to provide quality psychiatric clinical care within the community.