Hi krjarrell2013,
I believe your instructor will review the externship paperwork you submitted and then give you a PASS (or FAIL) grade in order for you to graduate from the program. You will not be given a code to take the AVA examination (NAVTA exam) until after successfully completing the entire program.
If you feel too much time has passed and you have not heard back regarding the PASS/FAIL of your externship, please contact your instructor.