DeYoung has been credited as the writer of more Styx songs than any other Styx member. He was also the band's most successful writer, penning 7 of the band's 8 Billboard Top 10 singles as well as a solo top 10 single.
national provider identifier (NPI) A national provider identifier (NPI) is a unique ten-digit identification number required by HIPAA for all health care providers in the United States. Providers must use their NPI to identify themselves in all HIPAA transactions. Download this free guide.
The NPI is a ten-digit number (nine digits plus a check digit to detect keying errors.) It is simply a random number that never expires. It contains no information about the provider, such as state of residence or license number. The National Plan and Provider Enumeration System (NPPES) issue NPIs.