A $962,120 medical bill error - Los Angeles Times

This story also shows the big difference between a "negotiated" price and the actual bill for services from the hospital, which was around 10% of the entire calculated bill with full hospital pricing.  BD

Helen Dorroh White thought she was doing the right thing when she called a health insurance company to question a nearly $1-million medical bill. Instead, she said, no one seemed to care.
White, a Glendale lawyer, was closing the financial affairs for a deceased client when she came across the insurance statement. It showed a $962,120 bill for her client, Dusanka Mlinarevich, who spent four days at Glendale Adventist Medical Center after suffering minor injuries in a fall at her Burbank home last year.

Actual billings and payments were not affected, Stanislaw said. She confirmed that Glendale Adventist's bill was for $48,106 and said that SCAN paid a negotiated rate of $4,350 and that Mlinarevich, who died in August at age 78, was assessed a $150 co-payment.

A $962,120 medical bill error - Los Angeles Times