This link leads to the machine-readable files that are made available in response to the federal Transparency in Coverage Rule and includes negotiated service rates and out-of-network allowed amounts between health plans and healthcare providers. The machine-readable files are formatted to allow researchers, regulators, and application developers to access and analyze data more easily.
Aetna: Aetna Transparency in Coverage hyperlink
Kaiser Permanente: https://healthy.kaiserpermanente.org/front-door/machine-readable
Premera Blue Cross: https://premera.sapphiremrfhub.com/
Regence BlueShield: https://www.regence.com/transparency-in-coverage/