- Machinery, Supplies & Equipment - Business Supplies Related, East Patchogue
- Machinery, Supplies & Equipment - Construction & Contractor Related, East Patchogue
- Mailing, Delivery & Courier Service, East Patchogue
- Major Appliances, East Patchogue - Household & Kitchen
- Management Consultants & Services, East Patchogue
- Manicurists & Pedicurists, East Patchogue
- Manufacturing, East Patchogue
- Marinas & Aquariums, East Patchogue
- Marriage & Family Counselors, East Patchogue
- Martial Arts & Self Defense Schools, East Patchogue
- Masonry Contractors, East Patchogue - Stone Mason, Brick Mason - Install & Repair
- Medical & Health Service Organizations, East Patchogue
- Medical Diagnostic Clinics, East Patchogue - Clinical Labs & Centers
- Medical Supplies & Equipment, East Patchogue
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- Membership Sports & Recreation Clubs, East Patchogue
- Miscellaneous Government, East Patchogue
- Miscellaneous Professional, East Patchogue
- Mobile Homes for Rent & Lease, East Patchogue
- Modular & Mobile Homes For Sale, East Patchogue - Manufactured Homes Sale & Service
- Mortgage Bankers & Correspondents, East Patchogue
- Motion Picture Pre & Post Production Services, East Patchogue
- Motor Vehicle, East Patchogue
- Motor Vehicle Rental & Leasing, East Patchogue
- Moving Companies, East Patchogue
- Moving Truck Rental , East Patchogue
- Muffler Shop & Exhaust Systems, East Patchogue
- Music Schools, East Patchogue
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