That's a good question. Helicopters can be subject to the same procedures and guidelines as fixed-wing aircraft in the airport surface area. There is also a separate section in the FAA order 7110.65 which governs helicopter operations. It's a good read and will definitely help you understand what to expect from ATC and what ATC expects from you.
http://www.faa.gov/airports_airtraffic/air_traffic/publications/atpubs/ATC/Chp3/atc0311.html#atc0311.html.1