An NPI is a ten-digit, unique numeric identifier for healthcare providers in the United States of America from current National Provider Identifier (NPI) records. An NPI number is required for healthcare providers are used in a variety of ways that including billing, insurance, medicare & Medicaid, pharmacy information, and state specific medical boards NPIs have replaced health care provider identifiers used for standard transactions under the Health Insurance Portability and Accountability Act (HIPAA). A provider’s NPI will not change regardless of job or location change(s).