Mazel was treasurer of the corporation that built Edgewater Hospital in Chicago in 1928, and he served as its first medical director.[3]
In 1977, investigators from the United States Department of Health, Education, and Welfare found that the hospital had improperly spent Medicare funds on resources used by a private clinic owned by Mazel. The case was not referred for prosecution, but $363,000 in reimbursements were withheld.[4]
Edgewater remained a major medical center for many decades, until it closed in December 2001 after substantial Medicare and Medicaid fraud blacklisted it from receiving further business from federal or state medical programs.[7]
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