Petersen, Bill passed away peacefully on Monday 9/10/2019 while receiving wonderful care at Friendship Village and surrounded by family. He was 97 years of age. Bill was preceded in death by wife Mary Elizabeth Petersen, in 1990. He was fortunate to find love again and married Mary Wyatt Petersen in 1999. Bill is survived by his loving wife Mary, daughters Christine (Mark) Robbins and Susan Petersen, and son Charlie (Diane) Petersen, and grandchildren Alison, Andrea, David, Will, Ross and Erik. He is also survived by Mary's children Cacky, Libby, Wiz, and Andy and their families. Bill was born in St Paul and attended the University of MN for medical school and advanced training. He loved the medical profession, his patients and colleagues. He was a pioneer in physician leadership and quality improvement. He was associated with St Thomas Univ. and his career was linked forever with his great passion, Abbott Northwestern Hospital. Mary and Bill would often smile and together say, "What a wonderful life". A memorial service will be held on Saturday 10/5/2019 at 10 am at Westminster Presbyterian Church in downtown Minneapolis.