- Dance Companies, East Moriches
- Dancing Instructions, East Moriches
- Deck, Patio & Gazebo Design, Building, Cleaning, Repair & Maintenance Contractors, East Moriches
- Decorating & Designing Services, East Moriches
- Delicatessen Restaurants, East Moriches
- Dentists, East Moriches
- Developmental Disabilities, East Moriches
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- Disabled Persons Assistive Services, East Moriches
- Doctors, Physicians & Surgeons, East Moriches
- Dressmaking & Sewing Schools, East Moriches
- Driveway Contractors - Build, Repair, Sealing, East Moriches - Driveway Pavers - Concrete, Asphalt, Gravel Paving, etc
- Dry Well Contractors, East Moriches
- Dumpster Rental, East Moriches
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