FileFAST
FileFAST by Reimbursify where you can file a reimbursement claim (for private health insurance claims) for your out-of-network medical or mental-health office visits.
Cigna + Oscar
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.
No Surprises Act
You are entitled to receive a “Good Faith Estimate” that provides a clear explanation of the expected costs for your medical and mental health care.