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Lily Millen, DO Attending Psychiatrist, Department of Psychiatry and Behavioral Sciences Instructor of Psychiatry, Harvard Medical School Image NPI 1609404607 Print Profile Request an Appointment Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Phone: 617-355-6000 Listen Lily Millen, DO Attending Psychiatrist, Department of Psychiatry and Behavioral Sciences Instructor of Psychiatry, Harvard Medical School Medical Services Programs & Services Inpatient Psychiatry Service Psychiatry Languages English Education Undergraduate School University of Pennsylvania 2011 Philadelphia PA Medical School University of New England, College of Osteopathic Medicine 2020 Biddeford ME Residency Combined Adult and Child Psychiatry UMass Chan Medical School 2023 Worcester MA Fellowship Child and Adolescent Psychiatry UMass Chan Medical School 2025 Worcester MA Certifications American Board of Psychiatry and Neurology (Psychiatry) Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Phone: 617-355-6000