Depends on your contract. For example, many “academic” sites dont allow docs to work elsewhere while working for them.
U Arizona and Vanderbilt do this. You can not work elsewhere while you work for them. Some of my residents have signed contracts where they can not do any work of any sort without the permission of the hospital.
Say you are an ED doc and you want to open a med spa, you cant. Say someone wants you to consult on a medical device. You cant. Say you want to open an urgent care, you cant.. etc. Say you want to work shifts in another ED you cant….. without their permission.
Your contracts likely dont have this. Many do..