Ask the managing agent before you film in the lobby, because none of that hallway is yours
The arrival footage a New York practice most needs is shot almost entirely on property the practice does not control.
Patients get lost here. A ninth floor suite behind a security desk, a garden level in a brownstone, two flights up in a walk-up with nothing on the door. The single most useful clip you can publish is the walk in from the corner.
Most of that walk belongs to somebody else. House rules or a commercial lease can govern photography in common areas, and a managing agent may want notice, a certificate of insurance from whoever is filming, or a flat no.
There is a second problem the trades never face. On a shared medical floor, other practices' patients are in your frame at the elevator and in the vestibule, and none of them agreed to appear in dental marketing. Film before the floor opens, if the agent allows it at all.
The sidewalk carries most of the weight anyway. Awning, address, the nearest station entrance, then a cut to your own door, all of which you can shoot on a quiet morning without asking anybody.