In general you are not penalized for mistakes but for failing to provide the standard of reasonable care. There are various penalties for failing to provide thi

In general you are not penalized for mistakes but for failing to provide the standard of reasonable care. There are various penalties for failing to provide this level of care, including revocation of your license or exposure to malpractice suits (for which you would carry insurance). In the US this varies from state to state so you would want to talk to an expert in your state if you want details.