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AMA Physician Masterfile
The Physician Masterfile includes education, training and professional certification information on virtually all Doctors of Medicine (MD) and Doctors of Osteopathic Medicine (DO) in the United States, Puerto Rico, Virgin Islands, and certain Pacific Islands. It includes current and historical data for more than 1.4 million physicians, residents, and medical students in the United States. This figure includes approximately 411,000 graduates of foreign medical schools who reside in the United States and who have met the educational and credentialing requirements necessary for recognition.
Requires specific Unique Physician Identification Numbers (UPIN) or National Provider Identifiers (NPI) to access Physician Masterfile data. To request a quote for Masterfile data, one can fill out the form using the MMS Lists website.