Sebastian A. Mayer, M.D.

Upper East Side has its share of medical offices, but not all of them specialize in the kind of quiet, precise care that oncologists provide. Sebastian A. Mayer, M.D. operates out of Starr Pavilion at 520 E 70th St #3F, a building that blends into the neighborhood without drawing attention—exactly what you’d expect from a practice focused on cancer treatment. The address is straightforward, sandwiched between the usual mix of pre-war co-ops and the occasional café, which means it’s easy to overlook if you’re not looking for it. For appointments or questions, the number is (646) 962-7950—no automated menu, just a direct line to the office.

Oncology isn’t a field where you want surprises, and the practice sticks to what it knows: diagnosis, management, and ongoing care for various forms of cancer. The location at 520 E 70th St places it near enough to NewYork-Presbyterian’s main campus to feel connected, but far enough to avoid the institutional bustle. Directions can be pulled up on the map if you’re unfamiliar with the side streets off York. No frills, no fuss—just the kind of place that does its job without making a fuss about it.