Cellino & Barnes serves clients throughout Nassau County and Suffolk County, including, but not limited to: Amityville, Babylon, Baldwin,  Bayshore, Bethpage, Brentwood, Centereach, Central Islip, Commack, Copiague, Deer Park, East Meadow, Elmont, Elwood, Floral Park, Franklin Square, Freeport, Garden City, Greenlawn, Hauppauge, Hicksville, Holtsville, Huntington, Islandia, Islip, Jericho, Kings Park, Lake Success, Levittown, Lindenhurst, Long Beach, Lynbrook, Manhattan, Massapequa, Mastic, Medford, Melville, Merrick, Nesconset, Norwich, Oceanside, Patchogue, Plainview, Port Jefferson, Port Jefferson Station, Ronkonkoma, Rockville Centre, Seaford, Shirley, Smithtown, Syosset, Valley Stream, Wantagh, Westbury, and Woodbury.