If you are enrolled in a residency program, you are eligible to join for Graduate Student Dues. You have the option to join the ADA exclusively for $30 during your program. Or, if you are licensed in Pennsylvania, you also can join PDA and your district/local societies. PDA Graduate Student Dues are $25; district/local society dues vary. You will be eligible for the dues reductions of the Graduated Dues Structure when you complete your residency program.