As regards coordinating coverage under the group plan with Medicare for employees age 65 and older, employer size is a factor: If an employer has more than 20 employees, in most instances the group health plan is the primary payer and Medicare acts as the secondary payer. Traditional Medicare has two main parts: Part A is hospital coverage, and Part B is medical services.
1 pudding basin, a bowl in which raw pudding dough or batter is placed for cooking. 2  wash basin, a sink or bowl to contain water for cleaning hands and other minor washing. 3  toilet basin, an alternate name for a toilet bowl.asin may refer to: 1  Basin, a 5th century Thuringian king. 2  Basin (chanson de geste) , a poem about Charlemagne's childhood. 3  basin (maritime) , the area of a drydock which can be flooded and drained.
Drainage basin (catchment area) is the area which supplies a river system, lake or reservoir with water. The whole area consists of smaller sub-catchments supplying tributaries of the main ri-ver and direct catchments, which drain straight into a lake or main river (Box 3.1).ts purpose is to co-nvey excess water from a drainage basin, which will include the products of weathering and addi-tional loads of solutes produced by man. This pro-perty makes a drainage basin an integrator and its operation is reflected in the quantity and quality of the river run-off.