Grand View Health > Grand View Health Cardiology Alderfer and Travis > Providers Alderfer & Travis Cardiology Team Todd J. Alderfer, MD Samuel R. Coleman, MD Miroslawa Jablonski-Cohen, MD Mark A. Kudes, MD Benjamin Rosenfeld, MD David A. Travis, DO J. Doyle Walton, MD Brendan Hartman, PA-C Crystalynn Mulligan, CRNP