As a patient, is it inappropriate to ask a pain management doctor how many cervical radio frequency nerve ablations he has done? Are 5 of them alot?

It's fine to ask. As a patient you have a right to know what level of experience your physician has. So ask away. Cervical radio frequency ablations are not a really common procedure, even for someone who specializes in pain management. 5 is not a big number but if I felt comfortable with my doctor otherwise I wouldn't let that bother me. .