If you work with any kind of healthcare data, then odds are youâll deal with NPI (National Provider Identifier) numbers. The NPI is a 10-digit number consisting of 9 digits (with the first digit being a 1 or a 2) followed by a check digit. Double the value of alternate digits beginning with the rightmost digit. Add the individual digits of the products resulting from step 1 to the unaffected digits from the original number.
Louisiana remained nominally under Spanish control, until a transfer of power to France on November 30, 1803, just three weeks before the formal cession to the United States on December 20, 1803.
You are here. Louisiana Purchase. The Louisiana Purchase (1803) was a land deal between the United States and France, in which the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River for $15 million.