Doctor denies knowing about rampant LA-area Medicare fraud using his provider number

On a busy, gritty street in suburban Los Angeles, the white one-story stucco building looked like any other. Among the apartments, offices, sidewalk bodegas, the only defining feature was the building's door – a thick, solid slab of dark oak with a small, security grill about six inches square.

"Is Dr. Faustina here," I asked. "This is his address of record with the medical board."

 A face appeared in the cutout, "He doesn't work here."

That's odd, I thought, considering multiple...