Current government charges appear in the USCIS fee schedule and should be checked when the petition is prepared. The larger costs are internal: staff time spent assembling evidence and professional fees for developing the specialized-knowledge record.
Evidence gathering is where the hours go
For an operator that has never filed one of these, the fee is a small part of the bill. The work is in retrieving configuration histories, locating who wrote which procedure, assembling training records, and getting a senior leader to write and sign a considered statement about how uncommon the knowledge is. That is clinical, operational and administrative time, and it competes with running facilities.
Legal fees reflect the same work, because a specialized-knowledge case is constructed from those materials rather than from a form. If the individual will be placed at a site the affiliate does not own, the service agreements may need review, which is a separate legal cost on the commercial side. Read current fees from the fee schedule, Form G-1055.