An estimate from an Indian hospital is a package quote. It bundles the surgeon, the theatre, a defined number of nights in a defined class of room, and the drugs and consumables used during that admission. Quoted that way it is usually a fraction of what the same procedure costs in the United States, western Europe or the Gulf, and that difference is real rather than a marketing device.
The difficulty is that a package is defined by its edges. Two hospitals quoting for the same operation can differ by a wide margin simply because one included the implant and the other did not, or because one assumed two nights in intensive care and the other assumed none. Comparing the two headline numbers tells you almost nothing.