Share: Facebook LinkedIn Twitter Email The Hallowell ADHD Centers Return to Directory Provider Full Name The Hallowell ADHD Centers Service Diagnostician Address 142 North Road City Sudbury State Massachusetts ZIP Code 01776 Phone Number 978 287-0810 Second phone number 212 799 7777 Fax Number 978 287-5566 Population Served Children, Teens, Adults Website https://drhallowell.com/ Second Address 117 West 72nd Street, 3rd Floor Second City New York Second State New York Second Zip Code 10023