No, you are not required to have a lawyer to file for reconsideration. However, with the high percentage of “denied” claims, it is advisable to consult a professional that is familiar with the appeals process.
While hiring a professional doesn’t necessarily increase your chances of approval, they are experts in the appeals process. A lawyer can give you further insight into wording your claim, making sure your records are up to date, and ensuring that you have accurately filled out all paperwork.