1 This implies that the other two sides are of equal length, and that the diagonals are of equal length. 2  An alternative definition is: a quadrilateral with an axis of symmetry bisecting one pair of opposite sides. 3  Trapezium (NAm.): no sides are parallel.
An enumeration date commonly refers to the official or control date set for a particular enumeration event such as a census. The official enumeration date may vary from one enumeration to the next. The enumeration date is a control function for collecting data over a broad space of time. All data collected is based on its validity as of a single date, no matter what date the information is taken within the enumeration period.
National Provider Identifier (NPI) The NPI is a unique 10-digit numeric identifier used to identify health care providers and organizations. Its use is a requirement of the Health Insurance Portability and Accountability Act (HIPAA). Humana enforces the HIPAA requirement to use an NPI on standard electronic transactions.