Excellus BlueCross BlueShield
Central New York Region:
based in Syracuse, with an additional office in Watertown.
St. Lawrence, Jefferson, Lewis, Oswego, Onondaga, Cayuga, Tompkins and Cortland counties.
Central New York Southern Tier Region:
based in Elmira, with an addditional office in Binghamton.
Chenango, Broome, Tioga, Chemung, Schuyler and Steuben counties.
based in Rochester.
Monroe, Wayne, Livingston, Ontario, Yates and Seneca counties.
based in Utica, with additional offices in Oneonta and Plattsburgh.
Franklin, Clinton, Essex, Hamilton, Herkimer, Fulton, Oneida, Madison, Montgomery, Otsego and Delaware counties.
based in Buffalo
Niagara, Erie, Chatauqua, Cattaraugus, Allegany, Wyoming, Genesee and Orleans counties.