Waltham Office - MERSI
https://www.mersi.com/waltham-office1440 Main Street, Suite 201 Waltham, MA 02451 Telephone Numbers & Links Appointments (781) 891-6377 or toll free (866) 353-6377 International Patients (781) 891-6377 or email: ffoster@mersi.com Appointment Times Mondays – Fridays from 8:30 AM until 5:00 PM Saturdays – Once per month Click here for directions.