Medicaid Analytic Extract Provider Characteristics (MAXPC) Evaluation Report, 2010.

This report describes the motivation for creating the MAXPC file and its design and content. It also examines the quality and completeness of each of the six types of provider IDs (inpatient billing provider, long-term care billing provider, other services billing and servicing provider, and prescription drug billing and prescribing providers). The analysis focuses on the 45 states that had the requisite Medicaid Statistical Information System files available for calendar year 2010 services (Idaho, Kansas, Maine, New Jersey, North Dakota, and Utah are excluded). The quality and completeness vary substantially by state and type of provider ID.