Krotz-Dieleman Dental Office Deborah L. Krotz-Dieleman, D.D.S. 218 S. lowa Ave. Washington, IA 319-653-4298 Welcoming New Patients! Krotz-Dieleman Dental Office Deborah L. Krotz-Dieleman, D.D.S. 218 S. lowa Ave. Washington, IA 319-653-4298 Welcoming New Patients!