The Federal Supply Schedule (FSS) 621i --Professional and Allied Healthcare Staffing Services is a Multiple-Award Schedule (MAS) contract to provide temporary physicians, nurses and allied healthcare staff to government facilities. Under the 621i contract, each healthcare specialty is priced at fully loaded hourly rates, which includes direct labor costs, fringe benefits, overhead, general and administrative expenses and profit. In addition to the base rate, 621i contracts may also include pricing for overtime, shift differentials, weekday or weekend on-call fees and holiday rates. Government ordering activities require 621i services by issuing task orders against MAS contract in accordance with the FSS contract terms and Federal Acquisition Regulation (FAR) Subpart 8.4. This contract vehicle allows GCI the ability to provide contracted healthcare services to numerous federal agencies.