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.

Health Plan Transparency - Kaiser

Here is a link to the site on which Kaiser Permanente will post its in-network and out-of-network allowed amount machine-readable files (MRFs).