DUBAI, Sept 27 (Reuters) - Restructuring consultancy Alvarez & Marsal said on Sunday it has been appointed as administrators of a group of operating businesses related to NMC Healthcare by the Abu Dhabi Global Market Courts, a statement by Alvarez & Marsal said on Sunday. Richard Fleming and Ben Cairns of Alvarez & Marsal have been appointed as joint administrators, the firm said in an e-mailed statement.