The links below lead to machine-readable files made available in response to the federal Transparency in Coverage Rule and include 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 more easily access and analyze data.
Cigna:
https://www.cigna.com/legal/compliance/machine-readable-files
Kaiser Permanente:
http://kp.org/costestimates