John Black, an individual healthcare provider, has an NPI number registered with the National Plan and Provider Enumeration System (NPPES). This unique identifier is assigned by the Centers for Medicare & Medicaid Services (CMS) to help ensure compliance with the Health Insurance Portability and Accountability Act (HIPAA). The NPI number facilitates patient care, medical treatments, and claims processing, enabling seamless communication among healthcare professionals, health insurance companies, and other entities involved in the healthcare system.