A Medicare/Medicaid Provider Number (MPN) verifies that a provider has been Medicare certified and establishes the type of care the provider can perform. This identifier is a six-digit number. The first two digits specify the state in which the provider is located, and the last four digits indicate the type of facility. For ambulatory surgery centers, the MPN is 10 digits — with the first two digits representing the state where the surgery center is located.
MPN is also known as an OSCAR (Online Survey, Certification, and Reporting) Number, Medicare Identification Number, and Provider Number.