Depending on how the background check is done, it may show that there had been a previous conviction without any information. This type of information depends on how the background check is done as well as the state the offense occurred in.
If the information asks if you have ever been convicted, and you have (even if expunged) I suspect this may viewed as being less than truthful. What is going to be documented for a license application if there is a question about being charged or convicted? Slippery slope, and could lead to dismissal if not honest and transparent.
I know multiple individuals with charges and convictions who owned up and moved on. All of them are working as doctors.
Thanks.
Wook