Does an NPI Expire? NPI Changes, Deactivation and Reactivation
September 06, 2026Learn whether an NPI expires, when an NPI can be deactivated or reactivated, and whether changes to a provider's name, address, employer or specialty require a new NPI.
NPI Numbers on the CMS-1500 Claim Form
September 06, 2026Learn where NPI numbers appear on the CMS-1500 claim form, including Boxes 17b, 24J, 32a and 33a, and which provider each NPI identifies.
NPI vs. PTAN: What's the Difference?
September 06, 2026Learn the difference between an NPI and PTAN, including who issues each identifier, how Medicare uses PTANs, and why one NPI may be associated with multiple PTANs.
Can a Provider Have More Than One NPI?
September 06, 2026Learn when a provider can have more than one NPI, including Type 1 and Type 2 NPIs, sole proprietors, organization subparts, multiple locations and specialties.
Referring, Ordering and Supervising Provider NPI Explained
September 05, 2026Learn the difference between referring, ordering and supervising provider NPIs, how these provider roles are identified on professional claims, and when they may apply.