Fixed takes a percentage of the dollar value of tickets that get dismissed and you pay nothing for the service if it is not fixed.
Trying to get money out of an insurance company is sort of the opposite problem, though it gets monetized essentially the same way. Independent adjusters monetize by taking a cut of claims paid. This is basically the same monetization scheme that lawyers use for things like suing someone over an accident: They take a cut of cases they win, and you pay nothing if they lose. As far as I know, independent adjusters only work on real estate related claims, not health claims.
Last I checked, the only people legally entitled to talk to the insurance company on your behalf are your insurance agent of record, a lawyer or an independent adjuster. So, in practice, you would be talking about independent adjusters for the health insurance space. I am not clear that would even fly, legally.
Health insurance is a pain in part because it is very highly regulated. It has to comply with both federal and state laws in all jurisdictions in which it operates and laws for both health companies and financial services companies. Thus, it is subject to both HIPAA (Health Insurance Portability and Accountability Act) and The Gramm–Leach–Bliley Act (GLBA), also known as the Financial Services Modernization Act of 1999. I got annual training in Gramm-Leach-Bliley when I had an insurance job. Furthermore, claims must be reviewed and paid in accordance with various state laws. The company where I worked kept a database of "state exceptions." If you don't know those state exceptions yourself, good luck arguing the matter with an insurance company.
You are talking about a very challenging problem space.
I have had it cross my mind to offer a service helping people file claims with the company I once worked for. Although I haven't worked there in a while and some things have no doubt changed, I probably could help some people get more money out of their policy. But I have never gotten past the idle thought stage in part because insurance is such a pain of an industry, and in part for other reasons.
