CPV code 85311200 designates Welfare services for the handicapped in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
85311200 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 85311000 (Social work services with accommodation).