Can your job stop you from making money?
It sounds a bit ridiculous, but it could be true. It is not uncommon for physician employment agreements to include a clause that gives your employer the right to collect any and all income that you receive from outside activities. This includes speaking fees, expert witness fees and moonlighting activities.
You might think this sounds a bit unfair. I can assure you that your employer thinks your salary pays for all professional activities. The fact is that being a doctor is a unique profession in that your devotion to your employment can be critical to patient lives. It is not always unreasonable for a physician employer to want to ensure that your full working time and attention is devoted to your practice, hospital, and/or division. But, that doesn't mean that you should be denied the ability to earn extra income for work that you actually perform.
The key fact that all physicians should keep in mind is that your employer can only lay claim to your outside income if you sign an agreement that says they can. If you are negotiating a doctor employment contract with an employer that considers such a provision an absolute requirement, you have the choice as to whether you want to work for such an organization.
There are plenty of hospitals and practice groups out there that want you to build a name for yourself by speaking at conferences. And there are plenty of hospitals and practice groups that give you the freedom to make enough money to pay back loans and support your family through expert witness fees and/or moonlighting. It's better that you know and understand which type of employer you will be working for before you sign the employment agreement. And, if you're not sure, asking might be a good idea.