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:  https://www.anthem.com/machine-readable-file/search

Through UnitedHealthcare, UMR creates and publishes the Machine-Readable Files on behalf of Atlanta Paving & Concrete Construction, Inc.  To link to the Machine-Readable Files, please click on the URL provided:  transparency-in-coverage.uhc.com