To direct the Secretary of Health and Human Services to modify treatment categories for qualification as a rehabilitation hospital or unit for purposes of reimbursement under the Medicare prospective payment system for inpatient rehabilitation facilities.

Directs the Secretary of Health and Human Services to revise the definitions under Medicare regulations of "rehabilitation hospital" and "rehabilitation unit" for purposes of determining the applicable payment methodology under title XVIII (Medicare) of the Social Security Act.

Requires the Secretary, in determining whether a rehabilitation hospital or unit is eligible for reimbursement for services furnished to Medicare beneficiaries under the prospective payment system (PPS) for inpatient rehabilitation facilities, to modify the list of treatment categories otherwise applicable (commonly referred to as the "75 Percent Rule") to include all rehabilitation impairment categories (except miscellaneous) established by the Secretary for purposes of such prospective payment system.

(The "75 Percent Rule" requires that a rehabilitation hospital or unit show that during its most recent 12-month cost reporting period it served an inpatient population of whom at least 75 percent required intensive rehabilitative services for treatment of one or more of specified conditions.)