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MedAmerica Billing Services, Inc. (MBSI) of Modesto has been in the physician revenue cycle business since 1975. Over the years, MBSI has expanded to a six-building campus in Modesto along with additional operations in Ontario California, Green Valley AZ and Scottsdale, AZ. Today MBSI bills for 115 contracts in Emergency Medicine, Hospitalist services, and Urgent Care locations in nine states, with billing volumes of over 4.5 million patients per year. Steady growth over the years has resulted in employing over 900 people company wide.