"On a good day, they saw around 50 patients. It was generally between 30 and 50 patients. And from what we've been able to determine, they're billing Medi-Cal and Medicare $1,000 per patient," said Deputy City Attorney Carolyn Phillips.
The city attorney's office says it all added up to more than $5 million.
In all, seven people face charges, and they could face up to seven years in jail if convicted.
Barron and Arthur were being held on $500,000 bail. The Medical Board of California is looking into revoking the doctors' medical licenses.