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Deloitte, a global consultancy that reported revenue last year of $65 billion, pulls in billions of dollars from states – including contracts with governments in Montana and Colorado – and the federal government for supplying technology it says will modernize Medicaid. However, a KFF Health °µºÚ±¬ÁÏ investigation of eligibility systems found widespread problems.

Health providers may bill however they choose, including in ways that could leave patients with unexpected bills for "free" care. Preventive care left an Illinois couple with "surgical tray" charges.

Eloise Reynolds encountered a perplexing reality in medical billing: Providers can come after patients for more money well after a bill has been paid.