The owner of a Cobb County speech therapy company is accused of billing Medicaid for more than $500,000 worth of faulty claims.

A Cobb County grand jury indicted Timothy Robinson on four counts of Medicaid fraud and four counts of identity fraud, state Attorney General Sam Olens said Monday.

Robinson was the owner and operator of Robinson Rehabilitation Services Inc., which offered speech therapy services in Cobb County, Olens said. Robinson employed four speech therapists and was authorized to submit billing on their behalf to Georgia Medicaid.

During 2009 and 2010, all four speech therapists resigned from Robinson’s company, but Robinson allegedly continued billing for services using the four providers’ identification.

“In total, Robinson fraudulently received $549,326.05 in Medicaid payments to which he was not entitled,” according to a press release from the Attorney General’s Office.

Medicaid fraud is punishable by one to 10 years in prison and a fine of $10,000, Olens said. Identity fraud is punishable by one to 10 years in prison and a fine of up to $100,000.

A trial date was not announced.