Question: Does the ACA set prices for procedures etc or are insurance companies allowed to charge anything? Also, which insurance company has the best record for not overcharging for procedures?

Answer: The ACA does not set prices for medical services, nor for that matter does the law set health insurance rates. Insurance companies negotiate with health care providers - doctors, hospitals, etc.- to set a contract rate for each medical procedure or service. There is considerable variance in medical costs between insurance companies for the same service or procedure and also between providers within the same insurance company network, because negotiated contract rates are lower with some providers than others. There is no transparency for the consumer in this system so there is no way to compare the contract rates among carriers.