My suggestion would be to call the physician you are considering for these procedures. The cost very well may depend on the type of excision done: excision versus a shave; and the size of the mole. Personally, I charge for the first three and do the rest at no cost. My attitude is that the instruments, sutures etc. are already being used ( my costs are the same) so why charge more? However, my view is not universally shared so check first.
You should also be aware of the cost of pathology. Ever since the government foolishly enacted the CLIA regulations, in their determined effort to drive up the cost of medicine and stick it to the uninsured, we are forced to send specimens off to pathology, even the most innocuous looking moles. Usually, the pathology cost is greater than the surgeon's fee.
Al;so be aware that most insurance companies pay decently for the first two removed, somewhat less for the next two and virtually nothing for the remainder.