Urology

John T. Mansfield, M.D.

~ Urology ~ Dr. Mansfield earned his medical degree at the University of Rochester and completed both his general surgery internship and urology residency at the University of Utah. He is board certified by the American Board of Urology. Before joining Longview Urology in 2011, he completed a 21-year active… Read More »


Patrick M. Lassen, M.D.

~ Urology ~ Dr. Lassen is a board-certified urologist. He was born in Eugene, Oregon. He graduated Magna Cum Laude with a B.S. in Biology from Southern Oregon State College in 1986. After earning his medical degree at Oregon Health Sciences University (OHSU), he completed a general surgery internship and… Read More »


Chad C. Chesley, M.D.

~ Urology ~ Dr. Chesley was born in Little Rock, Arkansas and raised in Colorado. He graduated from Colorado College in 1990 with a B.S. in Biology and attended medical school at the St. Louis University School of Medicine. He then completed a internship in general surgery at the Naval… Read More »