Medical Tail Insurance / Malpractice Insurance

My spouse moved from one practice to another this year. To leave one practice, we had to pay, out of pocket, a sizable premium for tail insurance. I'm having a hard time figuring out how to account for this expense. He is not self employed and wasn't a partner or owner at either practice; however, this was a large, cash expense that we incurred.  I'd love help understanding where to enter this expense.