For most healthcare professions, you must send your PSEP certification application to your state office by October 15th of the year preceding admission. Veterinary (DVM) applicants are strongly encouraged to certify before September 15th; Montana DVM applicants must certify by September 1st. Most states will not accept late applications; consult with your state for details.
What is the PSEP application deadline?
Professional Student Exchange Program (PSEP)