| Suffolk County | Nassau County | The Hamptons | 
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| Multi Line Coverage Corporation 1227 Main St Port Jefferson NY, 11777 (631) 509-1852 | Multi-Line Coverage Corporation 51 E Main St Smithtown NY, 11787 (631) 366-4444 | ||
| Multipli Development GRP 14 Ocean Ave Patchogue NY, 11772 (631) 627-3748 | Multiservice Express 207 Post Ave Westbury NY, 11590 (516) 997-3080 | ||
| Municipal Programs 20 Randall Ave Freeport NY, 11520 (212) 781-7537 | MURPHY WM G CO INC 202 Sheridan Blvd Inwood NY, 11096 (718) 327-5511 | ||
| Musacchia Agency INC 50 Brooklyn Ave Massapequa NY, 11758 (516) 541-6900 | Mutual Life Insurance INC 500 Bi County Blvd Farmingdale NY, 11735 (631) 293-2828 | ||
| N GL Insurance Group 112 Merrick Rd Lynbrook NY, 11563 (718) 528-4400 | N Y Schools Insurance Rcprcl 333 Earle Ovington Blvd Uniondale NY, 11553 (516) 227-3355 | ||
| Nadent Group 309 Main St Islip NY, 11751 (631) 581-2355 | Nalin Coverage Limited 4638 Merrick Rd Massapequa NY, 11758 (212) 627-5556 | ||
| National Business Brokers 212 E Main St Huntington NY, 11743 (631) 421-1486 | National City Service Agency 40 Main St Port Washington NY, 11050 (516) 883-0567 | ||
| National Income Life Insurance 239 Great Neck Rd Great Neck NY, 11021 (516) 504-2000 | National Life Insurance CO of Vermont 1440 Veterans Hwy Islandia NY, 11749 (631) 582-6400 | ||
| National Life of Vermont INC 125 Jericho Tpke Jericho NY, 11753 (516) 338-9000 | National Risk Managers Limited 40 Crossways Park Dr Woodbury NY, 11797 (516) 364-6901 | ||
| Nationwide 90 13th Ave Ronkonkoma NY, 11779 (631) 615-2509 | Nationwide 125 Wilbur Pl Bohemia NY, 11716 (631) 615-2509 | ||