Patient Portal – Pediatrics West 133 Littleton Road, Westford, MA → 120 Boston Road, Suite 1, Groton, MA → 19 Pierce Avenue, Fitchburg, MA → Until further notice we will NOT be accepting walk-in patients. Please call the office for an appointment. HOME ABOUT Mission and Values Hours Locations Walk-In Care WHO WE SERVE Infants Pediatrics Adolescents.