WASHINGTON (AP) — Federal authorities say 25 people have been charged in a wide-ranging scheme to obtain millions of dollars in fraudulent Medicaid payments from the District of Columbia government.

U.S. Attorney Ronald Machen calls it the largest health-care fraud case in the city’s history. It involved bogus claims for home care services, a category of Medicaid claim that has grown dramatically in the city over the past 8 years. Machen says fraud is largely responsible for the increase in those claims.