These are some of the top CCC in Manhattan, by no specific order for ENT, cancer, that I can think of. As Andrew said, we are lucky with all the hospitals. Options are good.

MSKCC
Mount Sinai
Beth Israel
NYU
NY Presbyterian
NY Eye and Ear, for ENT and which is part of Beth Israel
Lenox Hill opened a world class ENT dept. hired the top ENT from MSKCC

Also, three of these hospitals have monthly SPOHNC meeting, support for people with oral head and neck cancer, once a month. I go to the one at Beth Israel the 3rd Thursday of each month, so there is a meeting next week, 2-4pm on the 5th floor, NYU has one, and so does Mt. Sinai, but I don't know their meeting dates, maybe Tue, Wed. You don't have to be treated at any to attend.