According to our records, this business is located at 724 S New St. in Dover (in Kent County), Delaware 19904, the location GPS coordinates are: 39.150792 (latitude), -75.526741 (longitude). Michael L Mattern & Assoc is categorized under Clinics (SIC code 8011). Known organization manager is Jane Mattern. Current estimates show that the unit has a sales volume of $5,490,000 and staff of approximately 18 people. You can contact the company by phone at (302) 734-3416.