Discuss the purpose for the master patient index (MPI)

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150 words minimum for each question .APA format. Sources must be cited in body of paper. Please use https://owl.english.purdue.edu/owl/resource/560/18/ as an guide on how to use APA format.
1.Why patient matching and the Master Patient Index (MPI) pose a challenge? Discuss the purpose for the master patient index (MPI) and explain the risks of duplicate medical record numbers if found in the MPI ?