Dr. Walen grew up in Dearborn, Michigan. She is a graduate of University of Dayton and Wayne State University School of Medicine. Dr. Walen completed her residency at Butterworth Hospital in Grand Rapids in 1984, and is board-certified in Pediatrics. She practiced pediatrics at Kent Pediatrics until 1986, then spent seven busy years as an "at-home mom" with her three children. Dr. Walen joined Alger Pediatrics in 1993. She is a full staff member at Helen DeVos Children's Hospital and St. Mary's Hospital. She is an Associate Clinical Professor of Pediatrics at Michigan State University and is involved in medical student and resident education. Dr. Walen is involved in Kids Health for Haiti, providing medical care to children in Port au Prince, Haiti. She is a member of St. Paul the Apostle Catholic Church.