I would consider charging for your time, or estimating how long you think it will take and charging a flat fee. Personally I would go with the flat fee because many providers think that the hourly rate is high. They compare it to wages they would pay an employee but that's not equal. For example, if you pay an employee $10 an hour it actually costs more like $15 when you consider taxes. Also, they don't consider the building expenses, wc insurance, disability, etc. Plus if they hire a $10 employee they aren't getting the expertise, etc. Also, the employee may require training, etc. You get the picture. I prefer to estimate my time and give a flat fee. So depending on the types of claims (surgical, family practice, chiropractic) and what the issues were in the office, I would estimate approx how many claims, divide by how many I estimate I could handle in 1 hour, and multiply by my hourly rate.