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 more easily access and analyze data.
https://www.cigna.com/legal/compliance/machine-readable-files
*Note that prior to 7/1/22, the link will take you to the Cigna.com home page, but will access the MRFs page after that date.