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Unique Identifiers Rule (Administrative Simplification)

As part of the HIPAA Administrative Simplification regulation, there are currently three unique identifiers used for covered entities in HIPAA administrative and financial transactions. The use of these unique identifiers will promote standardization, efficiency and consistency.

The unique identifiers under HIPAA regulations are:

Standard Unique Employer Identifier
The same as the Employer Identification Number (EIN) used on an organization's federal IRS Form W-2. This identifies an employer entity in HIPAA transactions.

National Provider Identifier (NPI)
NPI is a unique 10-digit number used for covered health-care providers in all HIPAA administrative and financial transactions.

National Health Plan Identifier (NHI)
The NHI is a Centers for Medicare & Medicaid Services (CMS) proposed identifier to identify health plans and payers.