12. SEGMENT INFORMATION Our operations involve servicing patients through our two reportable business segments: home health and hospice. Our home health segment delivers a wide range of services in the homes of individuals who may be recovering from surgery, have a chronic disability or terminal illness or need assistance with the essential activities of daily living. Our hospice segment provides palliative care and comfort to terminally ill patients and their families. The  other  column in the following tables consist of costs relating to corporate support functions that are not directly attributable to a specific segment. Management evaluates performance and allocates resources based on the operating income of the reportable segments, which exclude corporate expenses, but includes revenues and all other costs directly attributable to the specific segment. Segment assets are not reviewed by the company s chief operating decision maker and therefore are not disclosed below. For the Year Ended December 31, 2009 Home Health Hospice Other Total Net service revenue $ 1,409.4 $ 104.1 $   $ 1,513.5 Cost of service, excluding depreciation and amortization 670.1 54.4   724.5 General and administrative expenses 312.7 24.6 172.4 509.7 Provision for doubtful accounts 18.0 2.2   20.2 Depreciation and amortization 13.9 0.8 13.6 28.3 Operating expenses 1,014.7 82.0 186.0 1,282.7 Operating income $ 394.7 $ 22.1 $ (186.0 ) $ 230.8 For the Year Ended December 31, 2008 Home Health Hospice Other Total Net service revenue $ 1,118.2 $ 69.2 $   $ 1,187.4 Cost of service, excluding depreciation and amortization 523.6 39.0   562.6 General and administrative expenses 260.1 17.2 146.0 423.3 Provision for doubtful accounts 22.1 1.9   24.0 Depreciation and amortization 10.6 0.7 9.1 20.4 Operating expenses 816.4 58.8 155.1 1,030.3 Operating income $ 301.8 $ 10.4 $ (155.1 ) $ 157.1 For the Year Ended December 31, 2007 Home Health Hospice Other Total Net service revenue $ 653.9 $ 44.0 $   $ 697.9 Cost of service, excluding depreciation and am