Professional Records Lawyers & Attorneys Justin J. Sergio, Waltham MA - Lawyer View page Address: Fresenius Medical Care N.A.920 Winter St, Waltham, MA 02451 (781) 699-9245 (Office) Licenses: Massachusetts - Active 2001 Justin Sergio, Waltham MA - Lawyer View page Office: 920 Winter St., Waltham, MA ISLN: 916724434 Admitted: 2001