| PhysiciansErin Diem FNP Page Path Erin Diem, FNP Back to Search Erin Diem, FNP Rheumatology (Board Certified) Accepting New Patients 317.398.5303 At a glance Bio Erin Diem, FNP, received her Bachelor of Nursing from Indiana Wesleyan University and her Masters of Science in Nursing Indiana Wesleyan University. In her free time, Erin enjoys spending quality time with two sons and cooking. Request an Appointment Please complete the information below and a member of our team will be in touch with you shortly to confirm your appointment details. First Name Last Name Phone Email Address Reason for Appointment Reason for Appointment? First Available New Patient Cancel/Reschedule Check if you are a new patient. Submit