The amount of payment to be made under this part for facility services furnished, in connection with a surgical procedure specified pursuant to paragraph (1)(B), in a physician’s office shall be equal to 80 percent of a standard overhead amount established by the Secretary (with respect to each such procedure) on the basis of the Secretary’s estimate of a fair fee which—
(i)#
takes into account additional costs, not usually included in the professional fee, incurred by physicians in securing, maintaining, and staffing the facilities and ancillary services appropriate for the performance of such procedure in the physician’s office, and
(ii)#
takes such items into account in such a manner which will assure that the performance of such procedure in the physician’s office will result in substantially less amounts paid under this subchapter than would have been paid if the services had been furnished on an inpatient basis in a hospital.
Each amount so established shall be reviewed and updated not later than July 1, 1987 , and annually thereafter to take account of varying conditions in different areas.