We have a medical psychologist and lpc in our office. One of the lpc's is a lpc-s. even with them being licensed our mp signs off on everything. we also have lpc-i and phd -i. in our state, the unlicensed (interns) are billed under mp.
if they are licensed depending on insurance you can file under them. if a patient is seen by lpc here and has medicare, we have to file under mp. most other insurances the lpc is contracted. but you must see your state rules. etc.