John Fantegrossi, MSN, FNP Nurse Practitioner, Adolescent Substance Use and Addiction Program (ASAP) Image Phone 617-355-2727 NPI 1548218431 Print Profile Request an Appointment Locations Brookline Boston Children's Brookline 2 Brookline Place Brookline, Massachusetts 02445 Listen John Fantegrossi, MSN, FNP Nurse Practitioner, Adolescent Substance Use and Addiction Program (ASAP) Medical Services Programs & Services Adolescent Substance Use and Addiction Program Addiction Medicine Conditions & Treatments Substance Use Disorders Languages English Locations Brookline Boston Children's Brookline 2 Brookline Place Brookline, Massachusetts 02445