BillCheck and Themis are paused.
This page explained, in plain language, how to get help with a medical bill you think is wrong. It described two tools: BillCheck, which reviews a single bill and reports what it finds, and Themis, which tracks bills over time and helps dispute them.
Both are paused while they are brought up to the standard this company holds. The pages describing them have been taken down rather than left up saying things that are not true of them today.
If you are dealing with a medical bill now, write to support@lonia.ai.