A piano is the one item in your house that can injure a mover, destroy a stairwell and die of the trip — all at once. Here's how it's done properly inside a long distance move.
The short version: pianos travel inside your household shipment, skidded and padded, moved by a crew that knows the technique. The critical step is disclosure: tell every carrier about the piano at survey time so the crew, equipment and price reflect it. A piano that appears on moving day is how disputes start.
The lid locked, the pedals and legs removed on a grand, the case wrapped, the weight on a skid board with straps rated for it — and a stair plan agreed before anyone lifts. If a quoting carrier can't describe that process unprompted, that tells you something useful.